CN110113871B

CN110113871B - Circuit board assembly and electronic equipment

Info

Publication number: CN110113871B
Application number: CN201910368269.8A
Authority: CN
Inventors: 张会勇; 范艳辉
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-05-05
Filing date: 2019-05-05
Publication date: 2020-07-07
Anticipated expiration: 2039-05-05
Also published as: CN110113871A

Abstract

The application provides a circuit board assembly, includes: a circuit board; the electronic element is arranged on the circuit board; the electric connecting seat is arranged on the circuit board and is adjacent to the electronic element, and the electric connecting seat is used for being electrically connected to an electric connecting part of the flexible circuit board; and the shielding cover is arranged on the circuit board and covers the electronic element and the peripheral side of the electric connecting seat, and the shielding cover is used for shielding the electronic element and the electrostatic interference of the electric connecting seat and is also used for sealing the electronic element and the peripheral side of the electric connecting seat. The application also provides an electronic device. The electric connection seat is arranged in the shielding piece for shielding the electronic element, so that the shielding piece covers the periphery of the electric connection seat to prevent liquid from invading the electric connection seat, the waterproof sealing performance of the electric connection seat can be improved, and the safety and reliability of the electronic equipment are improved.

Description

Circuit board assembly and electronic equipment

Technical Field

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

Background

In electronic devices such as mobile phones, pads of Board-to-Board Connectors (BTBs) are exposed on a circuit Board, and when the circuit Board is attacked by liquid, different pin terminals in the Board-to-Board Connectors are easily short-circuited, so that chip circuit elements connected to the Board-to-Board Connectors are damaged, and the electronic devices cannot normally operate.

Disclosure of Invention

The application provides a can improve circuit board subassembly and electronic equipment of board to board connector's waterproof leakproofness.

In one aspect, the present application provides a circuit board assembly comprising: a circuit board; the electronic element is arranged on the circuit board; the electric connecting seat is arranged on the circuit board and is adjacent to the electronic element, and the electric connecting seat is used for being electrically connected to an electric connecting part of the flexible circuit board; and the shielding cover is arranged on the circuit board and covers the electronic element and the peripheral side of the electric connecting seat, and the shielding cover is used for shielding the electronic element and the electrostatic interference of the electric connecting seat and is also used for sealing the electronic element and the peripheral side of the electric connecting seat.

In another aspect, the present application provides an electronic device including the circuit board assembly described above.

The electric connection seat is arranged in the shielding piece for shielding the electronic element, so that the shielding piece covers the periphery of the electric connection seat to prevent liquid from invading the electric connection seat, the waterproof sealing performance of the electric connection seat can be improved, and the safety and reliability of the electronic equipment are improved.

Drawings

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

Fig. 1 is a perspective view of an electronic device according to an embodiment of the present application.

Fig. 2 is a cross-sectional view of an electronic device provided in an embodiment of the present application.

Fig. 3 is a cross-sectional view of a first circuit board assembly provided in an embodiment of the present application.

Fig. 4 is a top view of a first circuit board assembly provided in an embodiment of the present application.

Fig. 5 is a cross-sectional view of a second circuit board assembly provided in an embodiment of the present application.

Fig. 6 is a cross-sectional view of a third circuit board assembly provided in an embodiment of the present application.

Fig. 7 is a cross-sectional view of a fourth circuit board assembly provided in an embodiment of the present application.

Fig. 8 is a cross-sectional view of a fifth circuit board assembly provided in an embodiment of the present application.

Fig. 9 is a cross-sectional view of a sixth circuit board assembly provided in an embodiment of the present application.

Fig. 10 is a cross-sectional view of a seventh circuit board assembly provided in an embodiment of the present application.

Detailed Description

The technical solutions of 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.

Referring to fig. 1, fig. 1 is a first perspective view of an electronic device 100. The electronic device 100 may be a telephone, a television, a tablet computer, a mobile phone, a personal computer, a notebook computer, a vehicle-mounted device, a wearable device, or other electronic devices. For convenience of description, the electronic device 100 is defined with reference to the first viewing angle, the width direction of the electronic device 100 is defined as the X direction, the length direction of the electronic device 100 is defined as the Y direction, and the thickness direction of the electronic device 100 is defined as the Z direction.

Referring to fig. 2, fig. 2 is a cross-sectional view of an electronic device according to an embodiment of the disclosure. An electronic device 100 is provided that includes a circuit board assembly 10. Referring to fig. 3, the circuit board assembly 10 includes a circuit board 1, an electronic component 2, an electrical connector 3, and a shielding cover 4. The electronic component 2 is arranged on the circuit board 1. The electronic component 2 may be a chip or the like. The electrical connection socket 3 is disposed on the circuit board 1 and adjacent to the electronic component 2. In particular, the electrical connector 3 is arranged against the electronic component 2 without interfering with the electronic component 2, so that the electrical connector 3 and the electronic component 2 occupy a small area on the circuit board 1. The electrical connection socket 3 is also used for electrical connection to an electrical connection portion of a flexible circuit board. The shielding case 4 is disposed on the circuit board 1 and covers the electronic component 2 and the electrical connector 3. The shield can 4 is used for shielding the electronic component 2 and the electrical connector 3 from electrostatic interference and sealing the peripheral sides of the electronic component 2 and the electrical connector 3.

In one embodiment, referring to fig. 3, the pins of the electrical connector 3 are soldered to the pads on the circuit board 1, the electrical connector 3 is electrically connected to the electronic component 2 through the signal wires on the circuit board 1, and is also electrically connected to the functional device 20 through the flexible circuit board, so that the functional device 20 is electrically connected to the electronic component 2. The functional device 20 is a camera, and the electronic component 2 is a chip for controlling the camera to work. The shield cover 4 can realize electrostatic shielding of the chip, prevent electrostatic interference from working of the camera, and can also play a role in sealing the electric connection part of the electric connection seat 3 and the flexible circuit board.

In other embodiments, the functional device 20 is a microphone, a battery, a receiver, a display screen, or the like.

Specifically, the shield case 4 is a substantially rectangular parallelepiped frame. One surface of the frame body is an opening, and the other surface is sealed. The frame body is reversely buckled, so that the opening of the frame body faces the circuit board 1, the periphery of the frame body is hermetically connected to the circuit board 1, the electronic element 2 and the electric connection seat 3 are accommodated in the inner cavity of the frame body, and the frame body is shielded on the peripheral sides of the electronic element 2 and the electric connection seat 3, so that the electronic element 2 and the electric connection seat 3 in the frame body cannot be influenced when liquid invades the circuit board 1.

By arranging the electrical connector 3 in a shielding member for shielding the electronic component 2, the shielding member covers the periphery of the electrical connector 3 to prevent liquid from invading the electrical connector 3, so that the waterproof sealing performance of the electrical connector 3 can be improved, and the safety and reliability of the electronic device 100 can be improved.

In one embodiment, referring to fig. 3, the shielding case 4 has an opening 40. The circuit board assembly 10 further includes a flexible circuit board 5. The electrical connection portion 51 of the flexible circuit board 5 extends into the shielding case 4 through the opening 40 and is electrically connected to the electrical connection socket 3.

Specifically, referring to fig. 3 and 4, the shielding case 4 includes a top plate 41 and a side plate 42 surrounding the top plate 41. The top plate 41 is disposed opposite to the circuit board 1. The side plate 42 is connected between the top plate 41 and the circuit board 1. The electrical connection portion 51 of the flexible circuit board 5 can penetrate through the opening 40 on the side plate 42 and extend into the shielding case 4, so as to be electrically connected to the electrical connection socket 3, so that the functional device electrically connected to the flexible circuit board 5 is electrically connected to the chip electrically connected to the electrical connection socket 3.

In one embodiment, referring to fig. 3 and 4, the opening 40 is disposed on the side plate 42, and the flexible circuit board 5 extends into the shielding case 4 from the side of the shielding case 4, without increasing the thickness of the circuit board assembly 10, which is beneficial to reducing the thickness of the electronic device 100.

Further, referring to fig. 3 and 4, the side plate 42 includes a plurality of intersecting plate members. For example, the side plate 42 includes a first plate 421 and a second plate disposed opposite to each other, and a third plate and a fourth plate connected between the first plate 421 and the second plate. The opening 40 is provided in one of the four plates. For example, the first plate member 421. The electrical connector 3 is disposed close to the first plate 421, so that the electrical connection portion 51 of the flexible circuit board 5 is directly electrically connected to the electrical connector 3 after passing through the opening 40 without bypassing the electronic component 2 or bending, the space occupied by the flexible circuit board 5 in the shield can 4 is reduced, the space in the shield can 4 can be effectively utilized, and the device layout is reasonable.

In other embodiments, when the electrical connector 3 is disposed at a middle position of the electronic components 2, the opening 40 is disposed on the top plate 41 and faces the electrical connector 3. The flexible circuit board 5 extends into the shield cover 4 from the top surface of the shield cover 4, namely, can be directly connected to the electric connection socket 3 without bypassing the electronic component 2 around the electric connection socket 3, so that the length and the extension path of the flexible circuit board 5 are reduced.

In one embodiment, the number of the electrical connection sockets 3 is multiple. Correspondingly, the number of the electric connection parts 51 of the flexible circuit board 5 is the same as that of the electric connection sockets 3. In one embodiment, the number of the openings 40 may be the same as the number of the electrical connection sockets 3, so that each electrical connection portion 51 extends into the shielding cover 4 through one of the openings 40 and is electrically connected to one of the electrical connection sockets 3. The openings 40 may be formed on different boards, so that the electrical connectors 51 extend into the shielding case 4 from different sides of the shielding case 4, and the flexible circuit boards 5 are prevented from being jammed together. In another embodiment, the number of openings 40 may be less than the number of electrical sockets 3. A plurality of electrical connections 51 may extend through the same opening 40 into the shield 4 to reduce the number of openings 40.

In an embodiment, referring to fig. 5, the top plate 41, the electrical connector 3, the electrical connector 51 of the flexible circuit board 5, and the circuit board 1 are sequentially stacked. The top plate 41 abuts against the electrical connection portion 51 of the flexible circuit board 5 so that the electrical connection portion 51 is reliably connected with the electrical connection socket 3.

By designing the height of the shielding case 4, the top plate 41 abuts against the electrical connection portion 51 of the flexible circuit board 5, so that the top plate 41 can be pressed on the electrical connection portion 51, and the electrical connection portion 51 is in close contact with the electrical connection socket 3 under the pressure of the top plate 41, so that the electrical connection portion 51 is tightly connected with the electrical connection socket 3, and the problems that the electrical connection portion 51 is not firmly connected with the electrical connection socket 3 when the electronic device 100 shakes, so that poor contact is caused and the like are avoided.

In an embodiment, referring to fig. 6, a convex platform 411 is formed on the surface of the top plate 41 facing the circuit board 1 in a protruding manner. The boss 411 abuts the electrical connection portion 51.

When the height of the electronic component 2 is high, the height of the shielding case 4 is high, the top plate 41 and the electrical connection portion 51 are spaced from each other and cannot abut against the electrical connection portion 51, and thus the electrical connection portion 51 and the electrical connection socket 3 cannot be pressed together. By arranging the boss 411 on the surface of the top plate 41 facing the circuit board 1, the height of the boss 411 is just the same as the size of the gap, so that the boss 411 can abut against the electrical connection part 51, and further, under the condition that the electronic component 2 is higher, the boss 411 of the shielding cover 4 can still be pressed on the electrical connection part 51, the electrical connection part 51 is in close contact with the electrical connection seat 3 under the pressure of the boss 411, so that the electrical connection part 51 is tightly connected with the electrical connection seat 3, and the problems that the electrical connection part 51 is not firmly connected with the electrical connection seat 3 when the electronic device 100 shakes, the contact is poor and the like are avoided.

Specifically, the boss 411 may be formed by recessing the surface of the top plate 41 facing away from the circuit board 1. In other words, the boss 411 is integrally formed with the top plate 41.

In one embodiment, referring to fig. 7, the circuit board assembly 10 further includes an elastic member 6. The elastic member 6 is disposed between the boss 411 and the electrical connection portion 51.

When the boss 411 is integrally formed with the top plate 41, the hardness of the boss 411 is large. When the boss 411 presses the electrical connection portion 51, the boss 411 generates a hard pressure on the electrical connection portion 51, and the hard pressure easily causes the electrical connection portion 51 and the electrical connection socket 3 to deform.

By arranging the elastic member 6 between the boss 411 and the electrical connection part 51, the boss 411 is abutted to the electrical connection part 51 through the elastic member 6, and as the elastic member 6 can generate elastic deformation so as to convert the hard pressure of the boss 411 into elastic force, the electrical connection part 51 is in close contact with the electrical connection seat 3 under the elastic pressure, and the electrical connection part 51 and the electrical connection seat 3 are prevented from being damaged under the rigid force.

Specifically, the elastic member 6 may be foam, elastic rubber, elastic plastic, elastic sheet, or the like. The elastic member 6 may be attached to the surface of the boss 411.

In another embodiment, the boss 411 is made of an elastic material. When the boss 411 abuts against the electrical connection portion 51, the boss 411 generates elastic pressure on the electrical connection portion 51 without providing an elastic member 6 between the boss 411 and the electrical connection portion 51.

In one embodiment, referring to fig. 8, the shielding case 4 is electrically connected to the ground layer 11 of the circuit board 1. The flexible circuit board 5 has a first side 52 and a second side 53 which are opposite to each other. The electrical connection portion 51 is provided on the first surface 52. The second surface 53 is provided with a ground pin 531, and the ground pin 531 contacts and is electrically connected to the top plate 41, so that the ground pin 531 is grounded.

It is understood that the material of the shielding case 4 is conductive.

Specifically, referring to fig. 8, the circuit board 1 has a ground layer 11 and two hard insulating layers 12 and 13 disposed on two opposite sides of the ground layer 11. The ground plane 11 and the two hard insulating layers 12, 13 form a support plate for the circuit board 1. A through hole 14 is formed in the circuit board 1 to communicate with the ground layer 11, and when the shielding cover 4 is soldered to the circuit board 1, the shielding cover 4 is electrically connected to the ground layer 11 through the through hole 14, so that the shielding cover 4 is grounded, and static electricity is introduced into the ground layer 11 by the shielding cover 4, thereby achieving an electrostatic shielding effect on the electronic element 2 and the electrical connection socket 3.

Specifically, referring to fig. 8, a first surface 52 of the flexible circuit board 5 faces the electrical connector 3, and a second surface 53 of the flexible circuit board 5 faces the top plate 41. The first surface 52 is provided with the electrical connection portion 51, and the electrical connection portion 51 includes a plurality of conductive pins 511. The conductive pins 511 are electrically connected to the conductive terminals 30 on the electrical connector 3 for transmitting signals. And the second side 53 is provided with a ground pin 531. When the top plate 41 abuts against the flexible circuit board 5, the grounding pin 531 contacts and is electrically connected to the top plate 41, and since the top plate 41 of the shielding case 4 is electrically connected to the grounding layer 11, the grounding pin 531 is also electrically connected to the grounding layer 11, thereby realizing grounding of the flexible circuit board 5.

By arranging the grounding pin 531 of the flexible circuit board 5 on the back of the electrical connection part 51, when the shielding case 4 abuts against the flexible circuit board 5, the grounding pin 531 contacts and is electrically connected with the shielding case 4, so as to realize grounding, therefore, the shielding case 4 not only plays a role in electrostatic shielding and sealing protection of the electrical connection part 51, but also plays a role in pressing the electrical connection part 51 and the electrical connection seat 3, and forms a part of a grounding path of the flexible circuit board 5, thereby realizing multiple purposes of the shielding case 4.

In an embodiment, referring to fig. 9, the shielding case 4 is electrically connected to the ground layer 11 of the circuit board 1. The electrical connector 3 has a first ground pin 31. The first ground pin 31 is electrically connected to the shield can 4. The flexible circuit board 5 has a second ground pin 54. The second ground pin 54 is electrically connected to the first ground pin 31 to be grounded.

Specifically, referring to fig. 9, the second grounding pin 54 of the flexible circuit board 5 is electrically connected to the shielding cover 4 by electrically connecting to the first grounding pin 31 of the electrical connector 3, so as to achieve grounding, in other words, the shielding cover 4 forms a part of the grounding path of the flexible circuit board 5, so that the shielding cover 4 not only plays a role of electrostatic shielding and sealing protection of the electrical connector 51, but also plays a role of pressing the electrical connector 51 and the electrical connector 3, and forms a part of the grounding path of the flexible circuit board 5, thereby achieving multiple purposes of the shielding cover 4.

In one embodiment, referring to fig. 10, the circuit board assembly 10 further includes a sealing member 7. The sealing member 7 is sealingly connected to the flexible circuit board 5 and the inner wall of the opening 40.

The opening hole 40 is sealed by arranging the sealing element 7, so that the sealing performance of the shielding case 4 is improved, the electronic element 2, the electric connection part 51 and the electric connection seat 3 can be protected by the shielding case 4 in a sealing mode, and the sealing and waterproof performance of the circuit board assembly 10 is improved.

Specifically, the sealing member 7 may be filled in the opening 40. Alternatively, the sealing member 7 may be attached to the surface of the side plate 42 and cover the opening 40.

In one embodiment, referring to fig. 10, the inner surface and the outer surface of the side plate 42 are respectively protruded with a first protruding ring 43 and a second protruding ring 44. The first collar 43 has a first through hole 431 communicating with the opening 40. The second male ring 44 has a second through hole 441 communicating with the open hole 40. The flexible circuit board 5 penetrates through the second through hole 441, the opening 40 and the first through hole 431. The sealing member 7 is sealed in the second through hole 441, the opening 40 and the first through hole 431.

Further, the sealing member 7 is a sealant. Liquid sealant is sprayed into the second through hole 441, the open hole 40 and the first through hole 431 at a higher temperature, and when the liquid sealant is cooled, a solid sealant is formed, so that the liquid sealant can be sealed into the second through hole 441, the open hole 40 and the first through hole 431.

In order to reduce the space occupied by the shielding case 4, the wall thickness of the side plate 42 of the shielding case 4 is thinner, and thus the hole wall of the opening 40 is thinner, which makes it inconvenient for the sealing member 7 to be filled in the opening 40.

Through the arrangement of the first convex ring 43 and the second convex ring 44 on the two sides of the opening 40, the second through hole 441 is communicated with the opening 40 and the first through hole 431 to form a through hole with a relatively thick hole wall, the sealant can be conveniently sealed in the through hole with the thick hole wall, and the sealing reliability of the sealant is improved. Further, the sealant not only has a sealing function for the shielding case 4, but also has a fixed connection function for the flexible circuit board 5 and the shielding case 4, and even if the flexible circuit board 5 is located outside the shielding case 4, the part outside the shielding case 4 is pulled, the electric connection part 51 and the electric connection of the electric connection socket 3 are not affected, so that the electric connection part 51 and the electric connection reliability of the electric connection socket 3 are improved, and the reliability of the electronic device 100 is improved.

The method of assembling the circuit board assembly 10 includes the following steps without limitation.

Arranging the electronic element 2 and the electric connecting seat 3 on the circuit board 1; extending the electrical connection portion 51 of the flexible circuit board 5 into the shielding case 4 through the opening 40 of the shielding case 4; the electric connection part 51 is buckled on the electric connection seat 3; welding the shielding cover 4 on the circuit board 1, so that the electronic component 2 and the electrical connection socket 3 are disposed in the shielding cover 4, and the top plate 41 of the shielding cover 4 abuts against the electrical connection portion 51, so that the electrical connection portion 51 is electrically connected to the electrical connection socket 3; and sealing the opening 40 by adopting a sealant, and fixedly connecting the flexible circuit board 5 with the inner wall of the opening 40 by adopting the sealant.

The foregoing is a partial description of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.

Claims

1. A circuit board assembly, comprising:

a circuit board;

the electronic element is arranged on the circuit board;

the electric connecting seat is arranged on the circuit board and is adjacent to the electronic element, and the electric connecting seat is used for being electrically connected to an electric connecting part of the flexible circuit board;

the shielding cover is arranged on the circuit board and covers the electronic element and the periphery of the electric connection seat, the shielding cover is electrically connected with a grounding layer of the circuit board, and the shielding cover is used for shielding the electrostatic interference of the electronic element and the electric connection seat and sealing the periphery of the electronic element and the periphery of the electric connection seat; and

the flexible circuit board, the one end of flexible circuit board is located in the shield cover, the one end of flexible circuit board is including the electric connection portion and the ground connection pin that set up back to back, electric connection portion orientation and electricity are connected the electric connection seat, ground connection pin orientation and electricity are connected the roof of shield cover, the roof of shield cover with the circuit board sets up relatively.

2. The circuit board assembly of claim 1, wherein the shield has an opening through which the electrical connection portion of the flexible circuit board extends into the shield and is electrically connected to the electrical connection socket.

3. The circuit board assembly of claim 2, wherein the shield further has a side plate connected between the top plate and the circuit board, the opening being provided in the side plate of the shield.

4. The circuit board assembly of claim 3, wherein the top plate, the electrical connection portion of the flexible circuit board, the electrical connection socket and the circuit board are sequentially stacked, and the top plate abuts against the electrical connection portion so that the electrical connection portion is reliably connected with the electrical connection socket.

5. The circuit board assembly of claim 4, wherein the flexible circuit board has a first side and a second side opposite to each other, the electrical connection portion is disposed on the first side, and the second side is disposed with the ground pin.

6. The circuit board assembly of claim 4, wherein a surface of the top plate facing the circuit board is embossed with a boss abutting the electrical connection portion.

7. The circuit board assembly of claim 6, further comprising an elastic member disposed between the boss and the electrical connection portion.

8. The circuit board assembly of claim 2, wherein the shield is electrically connected to a ground layer of the circuit board, the electrical connector has a first ground pin electrically connected to the shield, and the flexible circuit board has a second ground pin electrically connected to the first ground pin for grounding.

9. The circuit board assembly of claim 3, further comprising a seal member sealingly attached to the flexible circuit board and an inner wall of the opening.

10. The circuit board assembly of claim 9, wherein the inner surface and the outer surface of the side plate are respectively provided with a first protruding ring and a second protruding ring in a protruding manner, the first protruding ring has a first through hole communicated with the opening, the second protruding ring has a second through hole communicated with the opening, the flexible circuit board penetrates through the second through hole, the opening and the first through hole, and the sealing member is sealed in the second through hole, the opening and the first through hole.

11. The circuit board assembly of claim 9, wherein the sealing member is a sealant.

12. An electronic device comprising the circuit board assembly of any one of claims 1 to 11.