CN107484405B

CN107484405B - Mobile terminal and circuit board assembly thereof

Info

Publication number: CN107484405B
Application number: CN201710896061.4A
Authority: CN
Inventors: 陈鑫锋
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2017-09-27
Filing date: 2017-09-27
Publication date: 2020-01-03
Anticipated expiration: 2037-09-27
Also published as: CN107484405A

Abstract

The invention discloses a circuit board assembly, which comprises a circuit board, a wire, an electrical connector and a shielding piece, wherein the wire is arranged on the circuit board; the electric connecting piece is used for connecting the circuit board and devices on the periphery of the circuit board, and at least part of the projection of the electric connecting piece on the circuit board is superposed with the routing; the shielding part is arranged between the wiring and the electric connecting part and used for shielding the interference between the wiring and the electric connecting part. The invention also discloses a mobile terminal. Through the mode, the invention can avoid the mutual interference between the electric connecting piece and the wiring on the circuit board.

Description

Mobile terminal and circuit board assembly thereof

Technical Field

The present invention relates to the field of electronic devices, and in particular, to a mobile terminal and a circuit board assembly thereof.

Background

At present, mobile terminals such as smart phones and the like have become necessities of life of people, and various functions of the mobile terminals are also endless.

The device inside the mobile terminal or the signal connection line usually interfere with each other, for example, the antenna is an important device for the mobile terminal to send and receive signals, the antenna wiring is usually designed on the circuit board of the mobile terminal, the display screen of the mobile terminal usually needs to be connected with the antenna for signal transmission display, the wiring and the connection between the display screen and the connection part easily interfere with each other, and the display of the antenna related function or the display screen is adversely affected.

Disclosure of Invention

The embodiment of the invention provides a mobile terminal and a circuit board assembly thereof, which can avoid mutual interference of wiring and an electrical connecting piece.

The embodiment of the invention adopts a technical scheme that: a circuit board assembly, comprising: a circuit board; the routing is arranged on the circuit board; the electric connecting piece is used for connecting the circuit board and devices on the periphery of the circuit board, and at least part of the projection of the electric connecting piece on the circuit board is superposed with the routing; and the shielding part is arranged between the wiring and the electrical connecting part and used for shielding the interference between the wiring and the electrical connecting part.

The embodiment of the invention adopts another technical scheme that: a mobile terminal is provided, which comprises a terminal main body and a circuit board assembly, wherein the circuit board assembly is the circuit board assembly.

The invention has the beneficial effects that: the embodiment of the invention comprises the following steps by arranging the circuit board assembly: a circuit board; the routing is arranged on the circuit board; the electric connecting piece is used for connecting the circuit board and devices on the periphery of the circuit board, and the electric connecting piece is arranged adjacent to the routing; the shielding piece is arranged between the wiring and the electrical connecting piece and used for shielding the interference between the wiring and the electrical connecting piece and avoiding the mutual interference between the wiring and the electrical connecting piece.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional structure view of a circuit board assembly according to a first embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a circuit board assembly according to a second embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a circuit board assembly according to a third embodiment of the present invention;

fig. 4 is a schematic diagram of a mobile terminal of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. 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 invention.

The terms "first", "second", and the like in the present invention are used for distinguishing different objects, not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1, fig. 1 is a schematic cross-sectional structure diagram of a circuit board assembly according to a first embodiment of the present invention. In the present embodiment, the circuit board assembly includes: the circuit board 10, the trace 11, the electrical connector 12 and the shield 13.

The circuit board 10 may be a main circuit board of the mobile terminal. The Circuit Board 10 may be a PCB (Printed Circuit Board). In other embodiments, the circuit board may also be another circuit board in another mobile terminal, which is not limited in this embodiment of the present invention.

The traces 11 are disposed on the circuit board 10. Specifically, the traces 11 are disposed on the surface of the circuit board 10.

The trace 11 may be a metal trace and the trace 11 may be a trace associated with an antenna. For example, traces for transmitting antenna signals. In other embodiments, the trace 11 may be made of other materials.

The electrical connector 12 is used for connecting the circuit board 10 and devices around the circuit board 10, and a projection of the electrical connector 11 on the circuit board 10 is at least partially overlapped with the trace 11.

Alternatively, the electrical connector 12 may be a Flexible Printed Circuit (FPC), and the electrical connector 12 is used for connecting the Circuit board 10 and the display screen of the mobile terminal. Specifically, a lead wire may be provided on the flexible circuit board, and the lead wire is connected between the circuit board 10 and the display screen of the mobile terminal. In other embodiments, the electrical connector 12 may be a flexible circuit board, a board-to-board connector, or the like, connected between the other two devices.

The electrical connector 12 may be disposed above the trace 11, and at least a portion of a projection of the electrical connector 11 on the circuit board 10 coincides with the trace 11, so that when the internal components of the mobile terminal are disposed, the electrical connector 12 is not disposed to bypass the trace 11, but the shield shields the interference between the trace 11 and the electrical connector 12. Optionally, the width of the electrical connector 12 is greater than the width of the trace 11, and a projection of the electrical connector 12 on the circuit board 10 completely covers the trace 11.

The shielding element 13 is disposed between the trace 11 and the electrical connector 12 for shielding interference between the trace 11 and the electrical connector 12.

Optionally, in the present embodiment, the shielding element 13 is a shielding cover 13 disposed on the circuit board 10 and covering the trace 11.

Alternatively, the shield case 13 has a connection portion for connection with the circuit board 10, the connection portion being bent toward the inside of the shield case 13.

For example, the shield case 13 includes a top wall 130 and first and

second side walls

131 and 132 connected to the top wall 130 by bending, and the first and

second side walls

131 and 132 are respectively connected to the top wall 130 by bending at two opposite edges of the top wall 130. The first sidewall 131 and the second sidewall 132 are oppositely disposed. The bending connection may be a vertical bending connection or a bending connection at other angles, which is not limited in the embodiment of the present invention.

The shielding case 13 may further include a first connecting portion 133 connected to an end of the first side wall 11 away from the top wall 130 in a bent manner, and a second connecting portion 134 connected to an end of the second side wall 12 away from the top wall 130 in a bent manner.

Alternatively, the first connection portion 133 and the second connection portion 134 are both bent toward the inside of the shield can 13. In other words, the first and

second connection parts

133 and 134 are bent toward the inner sides where the first and

second sidewalls

131 and 132 are oppositely disposed to be close to each other. Since the width of the trace 11 is smaller than that of the electronic component, the space 13 inside the shield 13 can be used to accommodate the first connecting portion 133 and the second connecting portion 134, and the layout space of the circuit board 10 occupied by the shield 13 can be saved.

The shield case 13 is connected to the circuit board 10 by a first connection portion 133, for example, the first connection portion 133 is a first solder leg, and the second connection portion 134 is a second solder leg. The first connection portion 133 is soldered on the circuit board 10, and the second connection portion 134 is soldered on the circuit board 10.

In other embodiments, the connection manner of the shielding case 13 and the circuit board 10 may not be limited to the soldering described in this embodiment, and may be, for example, by gluing or snap-fit connection. The shape or configuration of the shield case 13 may not be limited to the structure described in the present embodiment, and for example, may include four side walls or a connection portion bent toward the outside of the shield case.

The shielding cover 13 may be made of a metal material, and in other embodiments, may also be made of other materials having a shielding effect, which is not limited in the embodiments of the present invention.

The shape of the shield cover 13 may be an elongated shape, and the length direction of the elongated shield cover 13 is arranged along the direction of the traces 12.

Referring to fig. 2, fig. 2 is a schematic cross-sectional structure diagram of a circuit board assembly according to a second embodiment of the present invention.

In the present embodiment, the circuit board assembly includes: circuit board 20, trace 21, electrical connector 22 and shield 23.

The circuit board 20 may be a main circuit board of the mobile terminal.

The traces 21 are disposed on the circuit board 20. Specifically, the traces 21 are disposed on the surface of the circuit board 20.

The trace 21 may be a metal trace and the trace 21 may be a trace associated with an antenna. For example, traces for transmitting antenna signals.

The electrical connectors 22 are used to connect the circuit board 20 and devices on the periphery of the circuit board 20.

Optionally, the electrical connector 22 may be a Flexible Printed Circuit (FPC), and the electrical connector 22 is used for connecting the Circuit board 20 and the display screen of the mobile terminal. The flexible circuit board may be provided with a wire connected between the circuit board 20 and the display screen of the mobile terminal.

The electrical connector 22 may be disposed above the trace 21, and a projection of the electrical connector 21 on the circuit board 20 at least partially coincides with the trace 21, so that when the internal components of the mobile terminal are disposed, the electrical connector 22 does not need to bypass the trace 11, but the shield shields the interference between the trace 11 and the electrical connector 12.

The shielding element 23 is disposed between the trace 21 and the electrical connector 22 for shielding interference between the trace 21 and the electrical connector 22.

Optionally, in the present embodiment, the shielding element 23 is a shielding layer 23 disposed on a surface of the electrical connector 22 close to the trace 21.

For example, the material of the shielding layer 23 may be an electromagnetic wave shielding material, and the electromagnetic wave shielding material is coated on the surface of the electrical connector 22 close to the trace 21 to form the shielding layer 23 after moisture is volatilized.

In other embodiments, the shielding layer 23 may be disposed on the surface of the trace 21 close to the electrical connector 22, or both the surface of the electrical connector 22 close to the trace 21 and the surface of the trace 21 close to the electrical connector 22 are disposed with the shielding layer.

Referring to fig. 3, fig. 3 is a schematic cross-sectional structure diagram of a circuit board assembly according to a third embodiment of the invention.

In the present embodiment, the circuit board assembly includes: circuit board 30, trace 31, electrical connector 32 and shield 33.

The circuit board 30 may be a main circuit board of the mobile terminal.

The traces 31 are disposed on the circuit board 30. Specifically, the trace 31 is disposed on the surface of the circuit board 30.

The trace 31 may be a metal trace and the trace 31 may be a trace associated with an antenna. For example, traces for transmitting antenna signals.

The electrical connector 32 is used to connect the circuit board 30 and devices around the circuit board 30.

Alternatively, the electrical connector 32 may be a Flexible Printed Circuit (FPC), and the electrical connector 32 is used for connecting the Circuit board 30 and the display screen of the mobile terminal.

The electrical connector 32 can be disposed above the trace 31, and a projection of the electrical connector 31 on the circuit board 30 at least partially coincides with the trace 31, so that the electrical connector 32 is not required to be disposed around the trace 31 when the internal components of the mobile terminal are disposed.

The shielding element 33 is disposed between the trace 31 and the electrical connector 32 for shielding interference between the trace 31 and the electrical connector 32.

Optionally, in the present embodiment, the shielding element 33 includes a shielding cover 331 disposed on the circuit board 30 and covering the trace 31, and a shielding layer 332 disposed on a surface of the electrical connector 32 close to the trace 31.

Optionally, the electrical connector 31 is adhered to the surface of the shielding cap 331 near the electrical connector 31 through the shielding layer 332.

The shield case 331 includes a top wall 3310 and first and second sidewalls 3311 and 3312 connected to the top wall 3310 by being bent, the first and second sidewalls 3311 and 3312 being respectively connected to the top wall 3310 by being bent at two opposite edges of the top wall 3310. The first and second sidewalls 3311 and 3312 are oppositely disposed. The bending connection may be a vertical bending connection or a bending connection at other angles, which is not limited in the embodiment of the present invention.

The shield 331 may further include a first connecting portion 3313 connected to an end of the first sidewall 3311 away from the top wall 3310 and a second connecting portion 3314 connected to an end of the second sidewall 3312 away from the top wall 3310.

Alternatively, the first connection portion 3313 and the second connection portion 3314 are both bent toward the inside of the shield case 331. In other words, the first connecting portion 3313 and the second connecting portion 3314 are bent toward the inner sides of the first sidewall 3311 and the second sidewall 3312, which are oppositely disposed. Since the trace 31 has a smaller width than the electronic component, the first connecting portion 3313 and the second connecting portion 3314 can be accommodated by the space inside the shield 331, and the layout space of the circuit board 30 occupied by the shield 331 can be saved.

The shield 331 is connected to the circuit board 30 by a first connection portion 3313, for example, the first connection portion 3313 is a first solder leg, and the second connection portion 3314 is a second solder leg. The first connection portion 3313 is soldered to the circuit board 30, and the second connection portion 3314 is soldered to the circuit board 30.

In other embodiments, the connection manner of the shielding case 331 and the circuit board 30 may not be limited to the soldering described in this embodiment, and may be, for example, by gluing or snapping. The shape or configuration of the shield 331 may not be limited to the structure described in the present embodiment, and for example, may include four sidewalls or a connection portion bent toward the outside of the shield.

The shielding cover 331 may be made of a metal material, and in other embodiments, may also be made of other materials having a shielding effect, which is not limited in the embodiments of the present invention.

The shield 331 may have an elongated shape, and a longitudinal direction of the elongated shield 331 is disposed along the direction of the traces.

The shielding layer 332 may be made of an electromagnetic wave shielding material, and the electromagnetic wave shielding material itself has a strong adhesive property, so that the electrical connector 32 can be adhered to the top wall 3310 of the shielding cap 331. On the one hand, the shielding effect can be achieved, on the other hand, the stability of the internal components of the mobile terminal can be improved, and the shaking of the electrical connecting piece 32 is avoided.

During assembly, a layer of electromagnetic wave shielding material is coated on the top wall 3310 of the shield 331, the electrical connector 32 is then tightly attached to the top wall 3310, and after moisture of the electromagnetic wave shielding material is volatilized, the shielding layer 332 adhered between the electrical connector 32 and the top wall 3310 is formed.

In other embodiments, the material of the shielding layer 332 may also be a mixture of an electromagnetic wave shielding material and an adhesive, so as to increase the connection strength between the electrical connector 32 and the shielding case 331.

In other embodiments, the shielding layer 332 may not be connected to the shield 331, but may maintain a certain gap therebetween.

Referring to fig. 4, fig. 4 is a schematic diagram of a mobile terminal according to the present invention. In this embodiment, the mobile terminal includes a terminal body 41, a circuit board assembly 42, and a display 43, where the circuit board assembly 42 is the circuit board assembly described in any one of the above embodiments.

Optionally, the electrical connector described in any of the above embodiments is used to connect the circuit board and the display screen 43. For example, the electrical connector is a flexible circuit board connected between the circuit board and the display screen 43, and is used for transmitting power supply and display signals from the circuit board to the display screen 43.

Alternatively, the mobile terminal may be a tablet Computer, a mobile phone, an e-reader, a remote controller, a Personal Computer (PC), a notebook Computer, a vehicle-mounted device, a network television, a wearable device, and other intelligent devices with network functions.

The embodiment of the invention comprises the following steps by arranging the circuit board assembly: a circuit board; the routing is arranged on the circuit board; the electric connecting piece is used for connecting the circuit board and devices on the periphery of the circuit board, and the electric connecting piece is arranged adjacent to the routing; the shielding part is arranged between the wiring and the electrical connecting part and used for shielding the interference between the wiring and the electrical connecting part, so that the mutual interference between the wiring and the electrical connecting part can be avoided.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A circuit board assembly, comprising:

a circuit board;

the routing is arranged on the circuit board;

the electric connecting piece is used for connecting the circuit board and devices on the periphery of the circuit board, and at least part of the projection of the electric connecting piece on the circuit board is superposed with the routing;

the shielding piece is arranged between the wiring and the electrical connecting piece and used for shielding the interference between the wiring and the electrical connecting piece, the shape of the shielding cover is a long strip shape, and the length direction of the shielding cover is arranged along the direction of the wiring; the shielding piece is a shielding cover which is arranged on the circuit board and covers the routing; the shielding cover is provided with a connecting part used for being connected with the circuit board, and the connecting part bends towards the inner side of the shielding cover.

2. The circuit board assembly of claim 1, wherein the electrical connector is a flexible circuit board.

3. The circuit board assembly of claim 1, wherein the trace is a trace associated with an antenna.

4. A mobile terminal, characterized in that the mobile terminal comprises a terminal body and a circuit board assembly, wherein the circuit board assembly is the circuit board assembly according to any one of claims 1-3.

5. The mobile terminal of claim 4, further comprising a display, wherein the electrical connector is configured to connect the circuit board and the display.