CN111864431A

CN111864431A - Electronic equipment and circuit board assembly thereof

Info

Publication number: CN111864431A
Application number: CN202010732748.6A
Authority: CN
Inventors: 刘幕俊
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2020-10-30
Anticipated expiration: 2040-07-27
Also published as: CN111864431B

Abstract

The present application relates to an electronic device and a circuit board assembly thereof. The circuit board assembly comprises a first circuit board, a second circuit board and an electric connector. The first circuit board comprises a first surface and a second surface which are opposite to each other, the first surface comprises a first part surface and a second part surface connected with the first part surface, and the second part surface is bent towards the second surface relative to the first part surface so as to form a plug space on the first surface; the junction of the first partial surface and the second partial surface forms an electrical contact region. The electric connector is provided with a contact part, and the contact part is at least partially accommodated in the plug space; the electric connecting piece is an electric conductor and is contacted with the electric contact area so as to be electrically connected with the first circuit board. The second circuit board is connected with the electric connecting piece and is electrically connected with the first circuit board through the electric connecting piece. The electronic equipment has high utilization rate of the internal space, and is favorable for the miniaturization design of the electronic equipment.

Description

Electronic equipment and circuit board assembly thereof

Technical Field

The present disclosure relates to electronic devices, and particularly to an electronic device and a circuit board assembly thereof.

Background

With the continuous development of electronic technology, electronic devices such as smart phones or tablet computers have become electronic devices commonly used by users. At present, the electronic equipment who has functional modules such as camera, structured light module is more and more common, and the camera makes electronic equipment can also take a picture, make a video recording when having the conversation function to greatly richen and expanded electronic equipment's service function, increased a lot of enjoyment for people's life, structured light module is then because of it has superior image capture ability, makes electronic equipment's use safer.

In order to improve the performance diversity of electronic devices, more and more functional modules are embedded in electronic devices, such as the functional modules described above. Each functional module needs to be electrically connected with a motherboard of the electronic device, and the electrical connection between the control circuit of the functional module and the motherboard is usually realized through a board-to-board connector. The board-to-board connector can realize quick and stable electrical connection due to the fact that the board-to-board connector forms a modular plug-in structure, and therefore the board-to-board connector is widely applied to circuit board connection inside electronic equipment. Under the condition that electronic devices in electronic equipment are more and more, the number of board-to-board connectors is more and more, and when the board-to-board connectors are used, a larger space on a mainboard needs to be occupied. Too much space is occupied by the board-to-board connector, so that the space utilization rate of the electronic equipment is low, and the miniaturization of the electronic equipment is not facilitated.

Disclosure of Invention

The embodiment of the application provides electronic equipment and a circuit board assembly thereof.

In a first aspect, an embodiment of the present application provides a circuit board assembly, which includes a first circuit board, a second circuit board, and an electrical connector. The first circuit board comprises a first surface and a second surface which are opposite to each other, the first surface comprises a first part surface and a second part surface connected with the first part surface, and the second part surface is bent towards the second surface relative to the first part surface so as to form a plug space on the first surface; the junction of the first partial surface and the second partial surface forms an electrical contact region. The electric connector is provided with a contact part, and the contact part is at least partially accommodated in the plug space; the electric connecting piece is an electric conductor and is contacted with the electric contact area so as to be electrically connected with the first circuit board. The second circuit board is connected with the electric connecting piece and is electrically connected with the first circuit board through the electric connecting piece.

In a second aspect, an embodiment of the present application further provides an electronic device, which includes a housing and the circuit board assembly, where the circuit board assembly is disposed in the housing.

In the electronic equipment that this application embodiment provided, realize the electric connection between first circuit board and the second circuit board through electric connector, left out traditional board to board connector, can reduce the shared space of connection structure between two circuit boards, be favorable to vacating more installation space for electronic equipment's electronic component, consequently electronic equipment's internal space utilization is higher, is favorable to electronic equipment's miniaturized design.

Furthermore, an inserting space is arranged on the first circuit board based on a bending structure of the second part surface relative to the first part surface, and the contact part of the electric connecting piece is at least partially accommodated in the inserting space to form an electrically connected inserting structure, so that the reliability of the electrical connection between the first circuit board and the second circuit board is higher and the first circuit board is not easy to loosen.

Furthermore, the joint of the first part surface and the second part surface is at least an intersection line between the surfaces, so that the electric contact area is at least a surface-surface intersection line contact area, when the electric connecting piece is at least partially accommodated in the inserting space, the electric connecting piece is contacted with the at least linear electric contact area, so that the electric connecting piece is at least in line contact with the first circuit board, the contact area between the electric connecting piece and the first circuit board is relatively large, the contact resistance between the electric connecting piece and the first circuit board is relatively low, and the electric connecting piece can pass relatively larger current to meet the requirement of high-current connection between the first circuit board and/or the second circuit board.

Drawings

In order to more clearly illustrate the technical solution 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 without creative efforts.

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

Fig. 2 is a schematic diagram of a connection structure of a circuit board assembly according to an embodiment of the present disclosure.

Fig. 3 is a schematic diagram of another connection structure of a circuit board assembly according to an embodiment of the present application.

Fig. 4 is a schematic diagram of another connection structure of a circuit board assembly according to an embodiment of the present application.

Fig. 5 is a schematic diagram of another connection structure of a circuit board assembly according to an embodiment of the present application.

Fig. 6 is a schematic diagram of another connection structure of a circuit board assembly according to an embodiment of the present application.

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

Fig. 8 is a schematic front elevation view of the electrical connector of fig. 4.

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

Fig. 10 is a schematic perspective cross-sectional view of an electrical connector of a circuit board assembly according to yet another embodiment of the present application.

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

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, 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. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

With the continuous development of electronic technology, electronic devices such as smart phones or tablet computers have become electronic devices commonly used by users. In order to improve the performance diversity of the electronic device, more and more functional modules, such as various camera modules, receiver modules, speaker modules, structural optical modules, etc., are embedded in the electronic device. Each functional module needs to be electrically connected with a motherboard of the electronic device, and the electrical connection between the control circuit of the functional module and the motherboard is usually realized through a board-to-board connector. When the board-to-board connector is used, a large space on the main board needs to be occupied. Too much space is occupied by the board-to-board connector, so that the space utilization rate of the electronic equipment is low, and the miniaturization of the electronic equipment is not facilitated.

The connection between the circuit boards is realized through a welding structure in a relatively traditional way, and a board-to-board connector with a large size can be omitted, so that the miniaturization of electronic equipment is facilitated. And the electric connection mode of the welding structure can realize larger current transmission through the welding wire and the welding pad with larger contact area, and has more obvious advantages. However, when the soldering structure is used for connecting circuit boards, in order to perform a soldering process, a sufficient operating space needs to be reserved around the soldering pad so as to extend into a soldering device for operation. Although the volume of the soldering structure is small, the process of forming the soldering structure still requires a large operation space, and it is not easy to arrange other electronic components in the operation space, and space is inevitably wasted.

In view of the above, how to implement the electrical connection between two circuit boards by using a smaller electrical connection structure is an urgent problem to be solved. In the above-mentioned solution for realizing the circuit boards by the soldering structure, it is known that the improvement of the body structure of the board-to-board connector to reduce the volume thereof, the improvement of the layout position of the board-to-board connector on the circuit board to take into account the influence of the board-to-board connector on the occupied space, the improvement of the soldering process of the soldering structure to reduce the operation space thereof, the attempt of creating another connecting structure to realize the electrical connection between the two circuit boards, and so on are considered in terms of 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 an electrical connector connected therebetween. The first circuit board comprises a first surface and a second surface which are opposite to each other, the first surface comprises a first part surface and a second part surface connected with the first part surface, and the second part surface is bent towards the second surface relative to the first part surface so as to form a plug space on the first surface; the junction of the first partial surface and the second partial surface forms an electrical contact region. The electric connector is provided with a contact part, and the contact part is at least partially accommodated in the plug space; the electric connecting piece is an electric conductor and is contacted with the electric contact area so as to be electrically connected with the first circuit board. The second circuit board is connected with the electric connecting piece and is electrically connected with the first circuit board through the electric connecting piece. The circuit board assembly realizes the electric connection between the first circuit board and the second circuit board through the electric connecting piece, omits the traditional board-to-board connector, can reduce the space occupied by the connecting structure between the two circuit boards, is favorable for making more mounting space for the electronic element of the electronic equipment, has higher utilization rate of the internal space of the electronic equipment and is favorable for the miniaturization design of the electronic equipment.

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. The specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to,"; "substantially" means that a person skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

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

Referring to fig. 1, the present disclosure provides a circuit board assembly 100, and the circuit board assembly 100 may be applied to an intelligent electronic device, for example, may 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 are opposite to each other, and the first surface 14 and the second surface 16 respectively form appearance surface structures on two sides of the first circuit board 10. The first surface 14 comprises a first partial surface 141 and a second partial surface 143 connected to the first partial surface 141. The second part face 143 is bent with respect to the first part face 145 towards the second surface 16 to form a plug space 12 at the first surface 14, the plug space 12 being intended to partially accommodate the electrical connector 50. The junction of the first partial surface 141 and the second partial surface 143 forms an electrical contact region 145. The electrical connector 50 has a contact portion 56, the contact portion 56 being at least partially accommodated in the plug space 12. The electrical connector 50 is an electrical conductor, and the electrical connector 50 contacts the electrical contact 145 to electrically connect with the first circuit board 10.

In the circuit board assembly 100, the second circuit board 30 is connected to the electrical connector 50 and electrically connected to the first circuit board 10 through the electrical connector 50, so that a conventional board-to-board connector is omitted, the space occupied by the connection structure between the first circuit board 10 and the second circuit board 30 can be reduced, and more mounting space is provided for electronic components of the electronic device 200, so that the utilization rate of the internal space of the electronic device 200 is high, and the miniaturization design of the electronic device 200 is facilitated. Further, the connection position of the first partial surface 141 and the second partial surface 143 is at least an intersection line between surfaces, so that the electrical contact area 145 is at least a surface-to-surface intersection line contact area, when the electrical connector 50 is at least partially accommodated in the insertion space 12, the electrical connector is in contact with the at least linear electrical contact area 145, so that the contact between the electrical connector 40 and the first circuit board 10 is at least a line contact, the contact area between the two is relatively large, the contact resistance of the electrical connector is relatively low, and the requirement of high-current connection between the first circuit board 10 or/and the second circuit board 30 can be met by relatively larger current through the electrical connector 50.

The first circuit board 10 may be a printed circuit board, which is used as a control main board of the electronic device 200 and is mainly used for controlling each electronic component of the electronic device 200 to operate. In some embodiments, the first circuit board 10 may be a Single-layer printed circuit board, which is also called a Single-sided board (Single-sided board), i.e., a printed circuit board with components concentrated on one side and wires concentrated on the other side.

In the present embodiment, the first circuit board 10 is a double-sided board, wherein the double-sided board is a printed circuit board with conductive traces distributed on both sides. Specifically, the first circuit board 10 includes a first surface 14 and a second surface 16, on which a plurality of conductive traces (not shown) are distributed, and the first circuit board 10 further includes a via 101, wherein the via 101 penetrates through the first surface 14 and the second surface 16. The via 101 may be spaced from the plugging space 12 to avoid the via 101 from damaging the electrical contact structure between the electrical connector 50 and the first circuit board 10. In other embodiments, the via hole 101 may also directly communicate with the plugging space 12, that is, the wall of the via hole 101 may be connected to the second partial surface 143, and the plugging space 12 and the via hole 101 may jointly penetrate through two opposite sides of the first circuit board 10, so that when the electrical connector 50 is electrically contacted with the first circuit board 10, it may be electrically connected to the conductive traces on the second surface 16 through the second partial surface 14 and the wall of the via hole 101, which may simplify the routing structure of the first circuit board 10, thereby reducing the manufacturing cost.

Further, a conductive medium (e.g., metal, etc., not shown) may be disposed in the via 101, so that the conductive line on the first surface 14 can be electrically connected to the conductive line on the second surface 16 through the conductive medium in the via 101, wherein the conductive medium may be a metal material coated on an inner wall of the via or filled in the via. By configuring the first circuit board 10 as a double-sided board, the wiring area thereof is relatively larger, and a more complicated circuit structure can be prepared, which is advantageous for reducing 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, also referred to as a "multi-layer board". At this time, the first circuit board 10 may include one or more single panels and/or one or more double panels, and the first circuit board 10 may be formed in a multi-layer structure by sequentially stacking a plurality of printed circuit boards, wherein an electrical insulation layer may be disposed between every two adjacent circuit boards. In some embodiments, the first circuit board 10 may be a 4-layer, 6-layer, 8-layer, 10-layer or even more printed circuit board. By configuring the first circuit board 10 as a multilayer printed circuit board, the wiring area thereof is relatively larger, and a more complicated circuit structure can be prepared, which is advantageous for reducing the overall volume of the circuit board assembly 100.

In the present embodiment, the plugging space 12 formed on the first surface 14 is substantially a concave structure disposed on the first surface 14, for example, it may be a hole structure or a groove structure. In particular, the plug space 12 is formed in dependence on the curved configuration of the second partial face 143 relative to the first partial face 141. In the present embodiment, the first partial surface 141 is substantially planar, and the curved structure of the second partial surface 143 towards the second surface 16 relative to the first partial surface 141 can be realized by a bending structure that makes the second partial surface 143 and the first partial surface 141 form a geometric angle with each other, for example, an acute angle, an obtuse angle, a right angle, or the like. In other embodiments, the curved structure of the second partial surface 143 facing the second surface 16 relative to the first partial surface 141 may be implemented by a curved connection structure therebetween, for example, the second partial surface 143 is curved or cambered relative to the first partial surface 141, and a definite included angle does not need to exist between the two structures, but the structure of the second partial surface 143 causes the plug space 12 to be a hole structure, a groove structure or a concave structure on the first surface 14, so as 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 the shape of the second partial surface 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 to contact with the surface of the second partial surface 143 to realize electrical connection. For example, the second partial surface 143 may be an inner quadrangular prism surface so that the plugging space 12 is a square hole, the second partial surface 143 may be an inner cylindrical surface so that the plugging space 12 is a circular hole, and the second partial surface 143 may be an inner elliptic cylindrical surface so that the plugging space 12 is an elliptic hole; alternatively, the surface shape of the second partial surface 143 is designed to make the plugging space 12 take on a shape of 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 a substantially inner cylindrical surface (e.g., an inner cylindrical surface, an inner elliptic cylindrical surface, an inner prismatic cylindrical surface, etc.), and two ends of the second partial surface are respectively connected to the first partial surface 141 and the second surface 16, so that the plugging space 12 has a through hole structure penetrating through two opposite sides of the first circuit board 10. As such, the requirement of the processing accuracy of the first circuit board 10 is 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 region 145 formed between the second partial surface 143 and the first partial surface 141 is a line-shaped contact region. When the contact portion 56 of the electrical connector 50 is accommodated in the inserting space 12, it contacts with the linear electrical contact region 145, and the contact area between the two is relatively large, and the contact resistance is relatively low, so that the electrical connector 50 can pass relatively larger current, and meet the requirement of high-current connection between the first circuit board 10 and/or 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, and it should be understood that the conductive medium layer 121 covers the second partial surface 143, which also covers a connection portion of the second partial surface 143 on the first partial surface 141, i.e. covers the electrical contact region 145, so as to facilitate 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. Conductive dielectric layer 121 may include any one or combination of the following metallic materials: gold, silver, copper, zinc, and the like. The conductive medium layer 121 is arranged on the second partial surface 143, so that the second partial surface can be protected from being scratched and damaged, and a suitable material is selected as the conductive medium, so that the electric connection resistance can be reduced, and the utilization rate of electric energy can be improved.

Referring to fig. 4, in some embodiments, the conductive medium layer 121 may include a copper layer 1211 and a gold layer 1213, the copper layer 1211 is directly attached to the second partial surface 143, and the gold layer 1213 covers the surface of the copper layer 1211 and is used for directly contacting the electrical connector 50 to achieve electrical connection. In this embodiment, the copper plating 1211 is used as a part of the conductive medium 121, so that the resistance of the conductive medium 121 is relatively small, which is beneficial to improving the utilization rate of the electrical energy. The gold plating layer 1213 covers the surface of the copper plating 1211, so that the copper plating 1211 can be protected from corrosion damage, which is beneficial to prolonging the service life of the first circuit board 10. In other embodiments, the conductive medium layer 121 may include at least one of a copper layer 1211 and a gold layer 1213, and may also include other metal 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 and not connected to the second surface 16, so that the plug space 12 is not recessed relative to the first surface 14 and does not penetrate through the second surface 16, and thus the plug space 12 may be understood as a groove or a blind hole formed on the first surface 14. When the contact portion 56 of the electrical connector 50 is accommodated in the plugging space 12, it contacts the linear electrical contact region 145, and at the same time, the contact portion 56 may also contact other regions of the second partial surface 143, for example, when the plugging space 12 is in a blind hole structure, and a partial region of the second partial surface 143 is a bottom wall of the blind hole structure, the contact portion 56 may also contact the bottom wall, further increasing the contact area between the electrical connector 50 and the second partial surface 143, so that the contact area between the two is relatively large, the contact resistance is relatively low, and the electrical connector 50 can pass relatively larger current, thereby meeting the requirement of high-current connection between the first circuit board 10 and/or the second circuit board 30.

Referring to fig. 6, in other embodiments, the second partial surface 143 may have a curved surface structure relative to the first partial surface 141, and the shape of the second partial surface 143 is substantially the same as or matched with the surface structure of the contact portion 56 of the electrical connector 50, when the contact portion 56 of the electrical connector 50 is accommodated in the inserting space 12, the contact portion 56 contacts the linear electrical contact region 145, and meanwhile, the contact portion 56 may also contact other regions of the second partial surface 143 to form a surface contact, so as to further increase the contact area between the electrical connector 50 and the second partial surface 143, so that the contact area therebetween is relatively large, the contact resistance therebetween is relatively low, and the electrical connector 50 can meet the requirement of high-current connection between the first circuit board 10 and/or the second circuit board 30 through relatively large current.

In the present 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, for example, a single-layer board, a double-sided board, a multi-layer board, etc., which is not limited in this application.

In the embodiment, the electrical connector 50 is formed by bending a metal sheet, so that it can be referred to as a spring structure with a certain elastic deformation capability, so that the contact portion 56 can be elastically deformed when being inserted into the inserting space 12, the firmness of the combination between the two is improved, and the electrical contact area is increased by the elastic deformation extrusion, so that the electrical connection between the first circuit board 10 and the second circuit board 30 is relatively stable and reliable. In the present embodiment, the electrical connector 50 is made of a copper sheet, and the surface thereof 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 sheet.

Referring to fig. 7, fig. 7 is a schematic perspective cross-sectional view illustrating an electrical connector 50 according to an embodiment of the present application. In the present embodiment, the electrical connector 20 includes a fixing portion 52, a connecting portion 54, and a contact portion 56. The fixing portion 52 is connected to the second circuit board 30, and the connecting portion 54 is connected between the fixing portion 52 and the contact portion 56. In this application, the terms "connected," "secured," and the like are to be construed broadly unless otherwise explicitly stated or limited. For example, the connection can be fixed, detachable or integrated; they may be connected directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. It should be understood that the structural designations of "fixed portion", "connecting portion" and "contact portion" in the present specification are only given for convenience of description, and these designations should not limit the structure of the electrical connector 50, for example, there may be no distinct dividing line between "fixed portion", "connecting portion" and "contact portion" (e.g., the electrical connector 50 is integrally formed by bending a metal sheet), or the "fixed portion", "connecting portion" and "contact portion" may be formed by different materials. This is the case for the nomenclature and description of the various portions of the electrical connector 50 that follow, unless otherwise noted.

In the embodiment, the fixing portion 52 is substantially 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 connector 50 has a firmer 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 in a substantially parallel structure, which is beneficial to reducing the size of the circuit board assembly 100 in the thickness direction, and thus beneficial to the thin design of the electronic device 300.

The connecting portion 54 is substantially in the form of a bent plate for being elastically deformed to elastically deform when the contact portion 56 is inserted into the plug space 12 so as to apply a pressing force to the contact portion 56 toward the plug space 12. The connecting portion 54 has a surface 540 facing away from the fixing portion 52, the surface 540 being used to form the contact portion 56 such that the contact portion 56 protrudes relative to the surface 540.

Further, referring to fig. 8, in the present embodiment, the connection portion 54 includes an elastic arm 541, a connection arm 543, and a support platform 545. The elastic arm 541 is bent and connected between the connecting arm 543 and the fixing portion 52, and the connecting arm 543 is connected between the elastic arm 541 and the supporting platform 545.

In this embodiment, there are two elastic arms 541, which are respectively the first elastic arm 5411 and the second elastic arm 5415. The first resilient arm 5411 is substantially bent in a "V" shape to facilitate resilient deformation. In particular, the first resilient 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 in a direction away from the fixing portion 52, so that an included angle between the first arm 5412 and the fixing portion 52 is substantially acute. The second arm 5413 is connected to one end of the first arm 5412 far from the fixing portion 52, and bends and extends relative to the first arm 5412, and an included angle between the second arm 5413 and the first arm 5412 is substantially acute, so that the first elastic arm 5411 is substantially bent in a V shape. The term "angle" in the present specification should be understood in a broad sense, for example, each arm is substantially plate-shaped, and the term "angle" between the two is understood to be a substantial angle between planes of the plate-shaped structures, and should not be taken into consideration when the circular arc connecting structures between the arms are provided. It should be understood that in the description of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The second elastic arm 5415 and the first elastic arm 5411 are spaced from each other, and are substantially bilaterally symmetrical. The second resilient arm 5415 is substantially bent in a "V" shape to facilitate resilient deformation. In particular, the second elastic arm 5415 comprises 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 in a direction away from the fixing portion 52, so that an included angle between the third arm 5416 and the fixing portion 52 is substantially acute. The fourth arm 5417 is connected to one end of the third arm 5416 away from the fixing portion 52, and bends and extends relative to the third arm 5416, and an included angle between the fourth arm 5417 and the third arm 5416 is substantially acute, so that the second elastic arm 5415 is substantially 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 supporting arm 547 is connected to one end of the third arm 5416 close to the fixing portion 52 and bent relative to the third arm 5416, and the supporting arm 547 is substantially overlapped on the surface of the fixing portion 52, so that the third arm 5416 can obtain a stable supporting force to prevent the third arm 5416 from being separated from the fixing portion 52 when the connecting portion 541 deforms.

In this embodiment, there are two connecting force arms 543, which are the first connecting force arm 5431 and the second connecting force arm 5433 respectively. The first link lever 5431 is substantially plate-shaped, is connected to one end of the second arm 5413 remote from the first arm 5412, and is bent with respect to the second arm 5413. The second connecting force arm 5433 and the first connecting force arm 5431 are arranged oppositely at intervals, and the structures of the second connecting force arm 5433 and the first connecting force arm 5431 are approximately in bilateral symmetry. The second connecting moment arm 5433 is generally plate-shaped and is connected to an end of the fourth arm 5417 distal from the third arm 5416 and is bent with respect to the fourth arm 5417.

The supporting platform 545 is disposed at a side of the connecting force arm 543 away from the supporting force arm 541, and two ends of the supporting platform 545 are respectively connected to the first connecting force arm 5431 and the second connecting force arm 5433. The support table 545 supports the contact 56. The aforementioned surface 540 of the connecting portion 54 is located on the side of the support platform 545 facing away from the fixing portion 52.

In the embodiment shown in fig. 7 and 8, contact portion 56 is a raised boss structure that protrudes relative to 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, the copper plating layer being located between the gold plating layer and the surface of the contact portion 56.

In the present embodiment, the contact portion 56 includes a first contact piece 561 and a second contact piece 563. The first contact 561 is connected to the support 545, bent with respect to the support 545, and extends in a direction away from the fixing portion 52. Further, the first contact 561 has opposite first and

second ends

5611 and 5613, the first contact 561 is connected to the support 545 by the first end 5611, and the second end 5613 is away from the support 545. The second contact piece 563 is connected to the support base 545, bent with respect to the support base 545, and extended in a direction away from the fixing portion 52. Further, the second contact plate 563 has a third end 5631 and a fourth end 5633 opposite to each other, the second contact plate 563 is connected to the support table 545 through the third end 5631, the fourth end 5633 is remote from the support table 545, and the fourth end 5633 is connected to the second end 5613 of the first contact plate 561. Therefore, the first end 5611 and the third end 5631 are oppositely arranged at intervals, and the second end 5613 and the fourth end 5633 are connected with each other, so that the contact part 56 is in a substantially V-shaped boss structure, which is beneficial to improving the contact area between the contact part 56 and the plugging space 12. Further, in the present embodiment, the insertion space 12 may be a bar-shaped groove shape in order to adapt to the outer shape of the contact portion 56. Further, the plug 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 an included angle is formed between the two surfaces so that the cross section of the second partial surface 143 is substantially "V" shaped, thus, when the contact portion 56 of the electrical connector 50 is accommodated in the plugging space 12, the substantially V-shaped boss structure of the contact portion 56 is in contact with the linear electrical contact region 145, and the substantially V-shaped boss structure of the contact portion 56 is in surface contact with the V-shaped surface of the second partial surface 143, so that the contact area between the electrical connector 50 and the second partial surface 143 is further increased, therefore, the contact area between the two is relatively large, and the contact resistance is relatively low, so that the electrical connector 50 can pass relatively larger current, and meet the requirement of high-current connection between the first circuit board 10 or/and the second circuit board 30.

Referring to fig. 9, fig. 9 is a schematic perspective cross-sectional view of an electrical connector 50 provided in another embodiment of the present application. In the present embodiment, the contact portions 56 are substantially in a V-shaped protruding bar structure, and the number of the contact portions 56 is plural, and the plural contact portions 56 are sequentially arranged at intervals. Correspondingly, the second partial surface 143 and the corresponding insertion spaces 12 may also be multiple and have a strip-shaped recessed groove structure (such as the above "V" -shaped strip groove, etc.), the multiple insertion spaces 12 correspond to the multiple contact portions 56 one by one, and an end of each contact portion 56 is accommodated in the corresponding insertion space 12. By arranging the plurality of plugging spaces 12 and the plurality of contact portions 56 to be matched in a one-to-one correspondence manner, a plurality of contact portions (including a plurality of line contacts and a plurality of surface contacts) exist between the electrical connector 50 and the first circuit board 10, and a parallel relation is formed between the plurality of contact portions, and if each contact portion can pass through 1 unit of current, n units of current can pass through n units of contact portions, so that the electrical connector 50 has high overcurrent capacity to be adapted to the functional module 250 requiring high current.

In other embodiments, the contact portion 56 may have a configuration other than a substantially "V" shape, and as shown in fig. 10, the contact portion 56 may have a circular or spherical-like convex structure, and the number of the contact portions 56 is plural, and the plural contact portions 56 are arranged at intervals. Correspondingly, the second partial surface 143 and the corresponding plug space 12 may also be multiple, and the second partial surface 143 may be a spherical surface, the plug space 12 may correspondingly be a spherical concave hole structure, the multiple plug spaces 12 correspond to the multiple contact portions 56 one by one, and an end of each contact portion 56 is received in the corresponding plug space 12. When the contact portion 56 of the electrical connector 50 is accommodated in the plugging space 12, while the circular or ball-like boss structure of the contact portion 56 contacts the linear electrical contact region 145, the circular or ball-like boss structure of the contact portion 56 may also form a surface contact with the spherical surface of the second partial surface 143, further increasing the contact area between the electrical connector 50 and the second partial surface 143, so that the contact area therebetween is relatively large, the contact resistance therebetween is relatively low, and the electrical connector 50 may pass relatively larger current, thereby satisfying the requirement of high-current connection between the first circuit board 10 or/and the second circuit board 30.

In assembling the circuit board assembly 100 provided in the embodiment of the present application, the prepared second circuit board 30 and the electrical connector 50 are first aligned with the first circuit board 10, and the contact portion 56 of the electrical connector 50 is aligned with the plugging space 12. Then, pressure is applied to the electrical connection portions 50 to insert the contact portions 56 into the corresponding insertion spaces 12. Therefore, the electrical connection between the first circuit board 10 and the second circuit board 30 can be realized quickly and conveniently, which is beneficial to improving the assembly efficiency and reducing the preparation cost.

In summary, in the circuit board assembly provided in the embodiment of the present application, the electrical connection between the first circuit board and the second circuit board is realized through the electrical connector, the conventional board-to-board connector is omitted, the space occupied by the connection structure between the two circuit boards can be reduced, and more installation spaces are provided for the electronic components of the electronic device, so that the utilization rate of the internal space of the electronic device is higher, and the miniaturization design of the electronic device is facilitated. Furthermore, the joint of the first part surface and the second part surface is at least an intersection line between the surfaces, so that the electric contact area is at least a surface-surface intersection line contact area, when the electric connecting piece is at least partially accommodated in the inserting space, the electric connecting piece is contacted with the at least linear electric contact area, so that the electric connecting piece is at least in line contact with the first circuit board, the contact area between the electric connecting piece and the first circuit board is relatively large, the contact resistance between the electric connecting piece and the first circuit board is relatively low, and the electric connecting piece can pass relatively larger current to meet the requirement of high-current connection between the first circuit board and/or the second circuit board.

Referring to fig. 11, based on the circuit board assembly 100, an electronic device 200 is further provided in the present embodiment, where 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 is described by taking a mobile phone as an example. It should be understood that throughout the description of the present specification, reference to the description of "one embodiment," "some embodiments," "other embodiments," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The electronic device 200 includes a housing 210 and any one of the circuit board assemblies 100, wherein the circuit board assembly 100 is disposed in the housing 210 for electrically connecting electronic components of the electronic device 200. The first circuit board 10 of the circuit board assembly 100 may be a printed circuit board, which serves as a control main board of the electronic device 200, and the second circuit board 30 of the circuit board assembly 100 may serve as a functional circuit board of electronic components of the electronic device 200, which is used for realizing electrical connection between the electronic components and the main board, so as to allow the main board to control the electronic components of the electronic device 200 to work.

The electronic device 200 further includes a display screen 230 and a function module 250, which are disposed on the housing 210, wherein the display screen 230 is used for displaying information such as images and characters, and providing a human-computer interaction interface with a user; the function module 250 is a module for implementing functions (such as functions of shooting and talking) of the electronic device 200.

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 performed on the display panel. The display panel may be a Liquid Crystal Display (LCD) panel, and in some embodiments, the display panel may also be a touch screen display.

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 functional module 250 to perform its function, or may be a transition circuit board connected to the circuit board of the functional module 250. The functional module 250 may include any one or more of a front camera, a rear camera, a flash, a receiver, a sensor, a speaker, a structured light module, a time-of-flight module, a fingerprint recognition module, a key module, and other functional components to implement the functions required by the electronic device 200. In this specification, the functional module 250 is described by taking a camera module as an example. In the embodiment of the present application, the number of the second circuit boards 30 of the circuit board assembly 100 may be multiple, and multiple second circuit boards 30 may be arranged in one-to-one correspondence with multiple functional components in the functional module 250, so as to implement electrical connection between different functional components and the first circuit board 10. Specifically, the number of the electrical connectors 50 and the number of the second circuit boards 30 are the same as the number of the 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 may also be used to connect the display screen 230, for example, the second circuit board 30 may be a control circuit board of the display screen 230 to connect to the first circuit board 10 through the electrical connector 50. In this respect, the display 230 may also be understood as one of the functional modules 250 described above. Because the electric connector 50 provided by the application has higher overcurrent capacity, the electric connection task between the display screen 230 and the mainboard can be undertaken, so that the traditional structure that a board-to-board connector is adopted to connect the display screen and the mainboard can be omitted, the internal structure of the electronic equipment 200 is simplified, and the cost is reduced.

In summary, in the electronic device provided in 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, so that the conventional board-to-board connector is omitted, the space occupied by the connection structure between the two circuit boards can be reduced, and more installation spaces are provided for the electronic components of the electronic device, so that the utilization rate of the internal space of the electronic device is higher, and the miniaturization design of the electronic device is facilitated. Furthermore, the joint of the first part surface and the second part surface is at least an intersection line between the surfaces, so that the electric contact area is at least a surface-surface intersection line contact area, when the electric connecting piece is at least partially accommodated in the inserting space, the electric connecting piece is contacted with the at least linear electric contact area, so that the electric connecting piece is at least in line contact with the first circuit board, the contact area between the electric connecting piece and the first circuit board is relatively large, the contact resistance between the electric connecting piece and the first circuit board is relatively low, and the electric connecting piece can pass relatively larger current to meet the requirement of high-current connection between the first circuit board and/or the second circuit board.

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

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A circuit board assembly, comprising:

the first circuit board comprises a first surface and a second surface which are opposite, the first surface comprises a first part surface and a second part surface connected with the first part surface, and the second part surface is bent towards the second surface relative to the first part surface so as to form a plug space on the first surface; the junction of the first partial surface and the second partial surface forms an electrical contact region;

the electric connector is provided with a contact part, and the contact part is at least partially accommodated in the plugging space; the electric connecting piece is an electric conductor and is in contact with the electric contact area so as to be electrically connected with the first circuit board; and

and the second circuit board is connected with the electric connecting piece and is electrically connected with the first circuit board through the electric connecting piece.

2. The circuit board assembly of claim 1, wherein two sides of the second partial surface are connected to the first partial surface and the second surface respectively, so that the plugging space penetrates through two opposite sides of the first circuit board to form a through hole structure.

3. The circuit board assembly of claim 1, wherein the second surface is provided with a copper plating.

4. A circuit board assembly according to claim 3, wherein the side of the copper plating remote from the second surface is provided with a gold plating.

5. The circuit board assembly of claim 1, wherein the electrical connector comprises a connecting portion and a fixing portion, the fixing portion is disposed between the second circuit board and the connecting portion, the connecting portion has a bent structure, and the contact portion is disposed on a side of the connecting portion away from the fixing portion.

6. The circuit board assembly of claim 5, wherein the connecting portion includes a surface facing away from the securing portion, and the contact portion is a raised boss structure projecting relative to the surface.

7. The circuit board assembly of any one of claim 6, wherein: the contact parts are multiple and are arranged at intervals; the second surface and the insertion spaces are multiple, the insertion spaces and the contact parts are arranged in a one-to-one correspondence mode, and each contact part is at least partially accommodated in the corresponding insertion space.

8. The circuit board assembly of claim 6, wherein: the contact part comprises a first contact piece and a second contact piece, the first contact piece comprises a first end and a second end which are opposite, and the first end is connected with the connecting part; the second contact piece includes opposing third and fourth ends, the third end connected to the connection portion and spaced opposite the first end, the second end connected to the fourth end.

9. The circuit board assembly of any one of claims 1-8, wherein: the electric connector is formed by bending a metal sheet, and the shape of the second surface is matched with that of the contact part so as to be in contact with the surface of the contact part.

10. An electronic device comprising a housing and the circuit board assembly of any one of claims 1-9, the circuit board assembly disposed within the housing.

11. The electronic device of claim 10, wherein the first circuit board is a motherboard of the electronic device, the electronic device further comprising a functional module, the second circuit board being connected to the functional module; the functional module comprises one or more of the following functional components: the device comprises a front camera, a rear camera, a flash lamp, a receiver, a sensor, a loudspeaker, a structured light module, a flight time module, a fingerprint identification module, a key module and a display screen; the number of the electric connectors and the number of the second circuit boards are the same as the number of the functional components in the functional module, and each second circuit board is correspondingly connected with one functional component.