WO2018137303A1

WO2018137303A1 - Mobile terminal

Info

Publication number: WO2018137303A1
Application number: PCT/CN2017/087550
Authority: WO
Inventors: 尹帮实; 尹建春; 刘秀兰; 薛康乐
Original assignee: 华为技术有限公司
Priority date: 2017-01-25
Filing date: 2017-06-08
Publication date: 2018-08-02
Also published as: CN108702401A

Abstract

A mobile terminal, comprising a device, a main circuit board, an auxiliary circuit board, and a first circuit board. The first circuit board comprises a first connecting plate, a second connecting plate, and a third connecting plate which are integrally formed and successively connected. The first connecting plate is connected to the main circuit board, and the third connecting plate is connected to the auxiliary circuit board. The device comprises two opposite surfaces and a circumferential side connected between the two surfaces. The main circuit board, the second connecting plate, and the auxiliary circuit board are provided around the circumferential side, and a wiring side of the second connecting plate is provided facing the circumferential side. The mobile terminal is thinner in overall thickness.

Description

Mobile terminal

The present application claims priority to Chinese Patent Application No. JP-A----------

Technical field

The present application relates to the field of communications device technologies, and in particular, to a mobile terminal.

Background technique

In mobile terminals such as smartphones, sometimes multiple printed circuit boards (PCBs) are used. When there is more than one printed circuit board in a mobile phone, it is necessary to construct a connection between each printed circuit board for data and energy communication.

At present, most smartphones adopt a three-stage design architecture. The motherboard is placed at the upper end of the battery, and a small board is placed at the lower end of the battery. A flexible printed circuit (FPC) is used to connect the main board and the small board, and the flexible circuit board is placed across the battery. The upper surface position or the lower surface position, that is, between the display screen and the battery or between the battery and the back cover. In this way, the flexible circuit board is disposed in the thickness direction of the smart phone, which inevitably increases the overall thickness of the smart phone, which is not conducive to the development of the thin and light of the smart phone.

Summary of the invention

The technical problem to be solved by the embodiments of the present application is to provide a mobile terminal with a thin overall thickness.

In order to achieve the above object, the implementation of the present application adopts the following technical solutions:

The embodiment of the present application provides a mobile terminal, including a device, a main circuit board, a sub-board, and a first circuit board. The first circuit board includes a first connecting plate, a second connecting plate, and a third connecting plate that are integrally formed and sequentially connected. The first connecting board is connected to the main circuit board, and the third connecting board is connected to the auxiliary circuit board. The device includes two surfaces that are oppositely disposed and a circumferential side that is coupled between the two surfaces. The main circuit board, the second connection board, and the auxiliary circuit board are disposed around the circumferential side, and a wiring surface of the second connection board is disposed facing the circumferential side.

In this embodiment, since the second connecting plate of the first circuit board is disposed around the circumferential side, the second connecting plate is disposed in a width direction of the mobile terminal, and the mobile terminal is reduced. The number of devices in the thickness direction thereof, so that the space of the mobile terminal in the width direction thereof can be fully utilized, and the space of the mobile terminal in the thickness direction thereof is saved, which is advantageous for reducing the thickness of the mobile terminal ( The thickness of the whole machine of the mobile terminal can be reduced by 0.1 mm to 0.2 mm or even more. Since the wiring surface of the second connection board faces the circumferential side, the dimension of the second connection board in the width direction of the mobile terminal is the thickness of the second connection board, and the second connection The thickness of the board is small, so that the size ratio of the whole machine width of the mobile terminal is small, so that the mobile terminal still has a better user experience.

It can be understood that, since the mobile terminal reduces the number of components in the thickness direction thereof and reduces the thickness of the whole machine, the design difficulty and processing difficulty of the front shell and/or the rear shell of the mobile terminal are reduced, which is advantageous. The structure and processing procedure of the front case and/or the rear case of the mobile terminal are simplified, and the production cost of the mobile terminal is reduced.

Wherein the wiring surface of the second connection board is substantially parallel with the side surface of the circumferential side surface adjacent to the second connection board, so that the second connection board occupies in the width direction of the mobile terminal Small space is good for reason Controlling the overall width dimension of the mobile terminal.

In other embodiments, an angle between the wiring surface of the second connecting board and the side of the circumferential side adjacent to the second connecting board may be formed at an angle of less than or equal to 15° to reduce assembly of the mobile terminal. Difficulty.

Wherein, the first connecting plate and the second connecting plate form a folded structure. In other words, the first connecting plate is folded over the second connecting plate, and the wiring surface of the first connecting plate is not parallel to the wiring surface of the second connecting plate. At this time, the first connecting plate can be smoothly overlapped on the surface of the main circuit board (for example, a surface for carrying components). The wiring surface of the first connection board may be substantially parallel to the surface of the main circuit board to reduce the assembly process difficulty of the first circuit board and the main circuit board.

The end of the first connecting plate away from the second connecting plate may be connected to the main circuit board through a connector. The connector may be a ZIF (Zero Insertion Force) connector or a BTB (Board to board) connector.

Wherein, the third connecting plate and the second connecting plate form a folded structure. In other words, the third connecting plate is folded over the second connecting plate, and the wiring surface of the third connecting plate is not parallel to the wiring surface of the second connecting plate. At this time, the third connecting plate can be smoothly overlapped on the surface of the auxiliary circuit board (for example, a surface for carrying components). The wiring surface of the third connection board may be substantially parallel to the surface of the auxiliary circuit board to reduce the assembly process difficulty of the third circuit board and the auxiliary circuit board.

The third connecting plate is away from the end of the second connecting plate and can be connected to the auxiliary circuit board through a connector. The connector may be a ZIF (Zero Insertion Force) connector or a BTB (Board to board) connector.

Wherein, the first circuit board is a two-layer board or a multi-layer board. The number of layers of the first circuit board can be set according to transmission requirements.

In an embodiment, the second connecting board includes a first sub-connecting board and a second sub-connecting board which are stacked in a width direction of the mobile terminal, and two ends of the first sub-connecting board are respectively connected Both ends of the second sub-connecting plate. At this time, an intermediate section of the first sub-connecting board (connected between both ends of the first sub-connecting board) and an intermediate section of the second sub-connecting board (connected to the second sub-connecting board) The hollowing between the ends of the two ends is not connected to each other, thereby facilitating the folding and forming of the second connecting plate. The layer structure of the first sub-connecting plate and the second sub-connecting plate is the same as that of the first connecting plate.

In this embodiment, the conductive traces of the second connection board may be arranged in the first sub-connection board and the second sub-connection board, that is, the first sub-connection board and the The second sub-connection board can realize signal transmission, so even if the size of the second connection board in the thickness direction of the mobile terminal is limited, the second connection board can be increased in width of the mobile terminal The number of trace layers in the direction to ensure or improve the transmission capability of the second connection board.

It is to be understood that the second connecting plate further includes an end connecting plate for connecting the two ends of the first sub-connecting board and the two ends of the second sub-connecting board in one-to-one correspondence, the end portion The connecting plate is integrally formed with the first sub-connecting plate and the second sub-connecting plate.

The first circuit board may be a flexible circuit board, a hard and soft combination circuit board or a rigid circuit board. When the first circuit board is a flexible circuit board, a gap may be formed in an intermediate portion of the second connecting board, and then folded along the slit to form a first sub-connecting board and a second sub-connecting board which are stacked.

The second connecting plate further includes a third sub-connecting plate, and the third sub-connecting plate and the second sub-connecting plate are stacked. The third sub-connecting board is disposed on a side of the second sub-connecting board away from the first sub-connecting board, or the third sub-connecting board is disposed on the second sub-connecting board and the first Between the sub-connectors. Both ends of the third sub-connecting board are respectively connected to two ends of the second sub-connecting board (and both ends of the first sub-connecting board). At this time, the conductive traces of the second connection board may be arranged in the first sub-connection board, the second sub-connection board, and the third sub-connection board.

One end of the first sub-connecting board is connected to the first connecting board, and one end of the second sub-connecting board is away from the first connecting board to connect the third connecting board. Since the two ends of the first sub-connecting board are respectively connected to the two ends of the second sub-connecting board, the first connecting board connected to one end of the first sub-connecting board can pass the first sub-board The connection board and the second sub-connection board transmit signals, and the third connection board connected to one end of the second sub-connection board can transmit signals through the first sub-connection board and the second sub-connection board .

In this embodiment, after the first circuit board is flattened, the first connecting plate, the second connecting plate, and the third connecting plate substantially form a zigzag plate, which is beneficial to improving the utilization rate of the jigsaw. Thereby reducing the cost of the first circuit board.

In an embodiment, the mobile terminal further includes a second circuit board. The second circuit board includes a first segment, a second segment, and a third segment that are integrally formed and sequentially connected. The main circuit board is provided with a radio frequency circuit, the auxiliary circuit board is provided with an antenna feeding point, the first section is connected to the main circuit board to be electrically connected to the radio frequency circuit, and the third section is connected The secondary circuit board is electrically connected to the antenna feed point, and the second section is disposed around the circumferential side.

It can be understood that the second circuit board can adopt the same or similar structure as the first circuit board, and the first segment can adopt the same or similar structure as the first connecting plate, the second segment A structure identical or similar to the second connecting plate may be employed, and the third segment may adopt the same or similar structure as the third connecting plate.

In this embodiment, since the second circuit board is used to connect the RF circuit board and the antenna feed point, the RF line of the antenna component of the mobile terminal is arranged on the second circuit board. The stacking arrangement and the routing settings of the second circuit board are used to control the impedance of the radio frequency line, thereby eliminating the coaxial cable and reducing the overall thickness of the mobile terminal.

Wherein, the second circuit board further includes a fourth segment and a fifth segment. The fourth segment is connected to one end of the second segment connecting the first segment, and the fourth segment is spaced apart from the first segment. The fifth segment is connected to one end of the second segment connecting the third segment, and the fifth segment is spaced apart from the third segment. The fourth segment is connected to the main circuit board, and the fifth segment is connected to the auxiliary circuit board. The fourth segment may employ the same or similar structure as the first segment, and the fifth segment may employ the same or similar structure as the third segment.

In this embodiment, the fourth segment and the first segment are isolated from each other for connection to different positions or devices of the main circuit board, and the fifth segment and the third segment are isolated from each other. Connected to different locations or devices of the secondary circuit board, such that the second circuit board can simultaneously be used to transmit different signals.

The second segment includes a first trace and a second trace that are isolated from each other, the first trace connects the first segment and the third segment, and the second trace connects the first Four paragraphs and the fifth paragraph. At this time, the first trace and the second trace can be used to transmit different signals.

Wherein the first segment is connected to the main circuit board through a first connector, and the fourth segment is connected to the main circuit board through a second connector, the type of the first connector Different from the type of the second connector. Since the first segment and the fourth segment are used to transmit different signals, the connection can be performed through different types of connectors. Better enough to achieve signal transmission.

The second segment is stacked with the second connecting plate.

In one embodiment, the mobile terminal further includes a display screen and a third circuit board, the display screen being stacked with the device. The display screen includes a display panel and a flexible circuit board electrically connected to the display panel, the flexible circuit board electrically connecting the auxiliary circuit board. The third circuit board includes an integrally formed first portion, a second portion, and a third portion, the first portion connecting the main circuit board, the third portion connecting the auxiliary circuit board to electrically connect to the flexible a circuit board, the second portion being disposed around the circumferential side. In this embodiment, the third circuit board is used to implement communication between the main board and the display panel.

It can be understood that the third circuit board can adopt the same or similar structure as the first circuit board, and the first part can adopt the same or similar structure as the first connecting board, and the second part can be The same or similar structure as the second connecting plate may be employed, and the third portion may adopt the same or similar structure as the third connecting plate.

The second portion and the second connecting plate are respectively disposed on two sides of the device.

In an embodiment, the second connecting plate is disposed to fit the circumferential side. At this time, the first circuit board portion is attached to the device arrangement, and the space between the first circuit board and the device can be omitted, thereby reducing the overall width of the mobile terminal.

The second segment of the second circuit board is disposed to fit the second connecting plate.

In an embodiment, the mobile terminal further includes a housing, and the device and the first circuit board are both disposed inside the housing. The second connecting plate is disposed to fit the inner wall of the housing. At this time, the first circuit board portion is disposed to fit the inner wall of the casing, and the space between the first circuit board and the casing can be omitted, thereby reducing the overall width of the mobile terminal.

Wherein the second circuit board and the third circuit board are both disposed inside the housing. The second segment of the second circuit board is disposed to fit the second connecting plate. The third circuit board and the first circuit board are respectively disposed on opposite sides of the device, and the third circuit board is disposed on an inner wall of the housing.

DRAWINGS

FIG. 1 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application.

Figure 2 is a cross-sectional view of the structure taken along line II-II of Figure 1.

3 is a schematic diagram showing a partial structure of the mobile terminal shown in FIG. 1.

Figure 4 is a partially exploded view of the structure of Figure 3.

Figure 5 is a partially exploded view of the structure of Figure 3.

Figure 6 is a partially exploded view of the structure of Figure 3.

FIG. 7 is a schematic structural diagram of an embodiment of a first circuit board of the mobile terminal shown in FIG. 1. FIG.

FIG. 8 is a partial structural schematic view of the first circuit board shown in FIG. 7. FIG.

FIG. 9 is a schematic structural view of the first circuit board shown in FIG. 7 in a flattened state.

FIG. 10 is a schematic structural view showing another embodiment of the first circuit board of the mobile terminal shown in FIG. 1 in a flattened state. FIG.

11 is a schematic structural view of a second circuit board of the mobile terminal shown in FIG. 1.

Figure 12 is a schematic view showing the structure of the second circuit board shown in Figure 11 in a flattened state.

detailed description

The embodiments of the present application are described below in conjunction with the accompanying drawings in the embodiments of the present application.

Referring to FIG. 1 to FIG. 9 , the embodiment of the present application provides a mobile terminal 100 . The mobile terminal 100 may be a mobile phone, a tablet computer, a notebook computer, a wearable device, or the like.

The mobile terminal 100 includes a device 1, a main circuit board 2, a sub-board 3, and a first circuit board 4. The first circuit board 4 includes a first connecting plate 41, a second connecting plate 42 and a third connecting plate 43 which are integrally formed and sequentially connected. The first connecting board 41 is connected to the main circuit board 2, and the third connecting board 43 is connected to the auxiliary circuit board 3. The conductive traces in the first circuit board 4 sequentially pass through the first connecting plate 41, the second connecting plate 42 and the third connecting plate 43. The conductive traces connect the main circuit board 2 and the auxiliary circuit board 3, thereby implementing communication between the main circuit board 2 and the auxiliary circuit board 3. The device 1 comprises two surfaces 11 arranged opposite each other and a circumferential side 12 connected between the two surfaces 11. The two surfaces 11 are arranged substantially in parallel. The distance between the two surfaces 11 is much smaller than the spacing between the two opposite sides of the circumferential side 12, and the thickness direction X of the mobile terminal 100 is substantially perpendicular to the two surfaces 11. The main circuit board 2, the second connection board 42 and the auxiliary circuit board 3 are disposed around the circumferential side surface 12, and the wiring surface 420 of the second connection board 42 is disposed facing the circumferential side surface 12.

Specifically, the main circuit board 2, the second connection board 42 and the auxiliary circuit board 3 are both disposed at the periphery of the circumferential side surface 12, and the main circuit board 2 can be adjacent to the circumferential side surface 12. The upper side surface 121 is disposed, and the auxiliary circuit board 3 can be disposed adjacent to the lower side surface 122 of the circumferential side surface 12, and the second connecting board 42 can be disposed adjacent to the left side surface 123 or the right side surface 124 of the circumferential side surface 12. The width direction Y of the mobile terminal 100 is substantially parallel to the two surfaces 11 and is substantially perpendicular to the left side surface 123 or the right side surface 124. A surface 21 of the main circuit board 2 for carrying components is substantially parallel to the two surfaces 11, and a surface of the main circuit board 2 close to the device 1 faces the upper side 121. A surface 31 of the auxiliary circuit board 3 for carrying components is substantially parallel to the two surfaces 11, and a surface of the auxiliary circuit board 3 close to the device 1 faces the lower side 122. The wiring surface 420 of the second connecting plate 42 refers to a surface of the second connecting plate 42 for arranging the conductive traces, and the wiring surface 420 of the second connecting plate 42 faces the left side surface 123 or The right side 124 is set. The thickness direction of the second connecting plate 42 is perpendicular to the wiring surface 420 of the second connecting plate 42. The directional terms used in the present application, for example, "upper", "lower", "left", "right", etc., are merely referring to the directions of the drawings, and thus the above-mentioned directional terms are not intended or implied. The device or component must have a particular orientation, configuration and operation in a particular orientation, and is not to be construed as limiting.

In the embodiment, since the second connecting plate 42 of the first circuit board 4 is disposed around the circumferential side surface 12, the second connecting plate 42 is disposed in the width direction Y of the mobile terminal 100. The number of devices of the mobile terminal 100 in its thickness direction X is reduced, so that the space of the mobile terminal 100 in its width direction Y can be fully utilized, and the space of the mobile terminal 100 in its thickness direction X is saved. It is advantageous to reduce the overall thickness of the mobile terminal 100 (which can be reduced by 0.1 mm to 0.2 mm, or even more), and the overall thickness of the mobile terminal 100 is thin. Since the wiring surface 420 of the second connecting plate 42 faces the circumferential side surface 12, the dimension of the second connecting plate 42 in the width direction Y of the mobile terminal 100 is the second connecting plate 42. The thickness of the second connecting plate 42 is small, so that the size ratio of the whole machine width of the mobile terminal 100 is small, so that the mobile terminal 100 still has a better user experience.

It can be understood that, since the mobile terminal 100 reduces the number of components in the thickness direction X thereof, the thickness of the whole machine is reduced, thereby reducing the design difficulty and processing difficulty of the front case and/or the rear case of the mobile terminal 100. Conducive to simplification The structure and processing steps of the front case and/or the rear case of the mobile terminal 100 reduce the production cost of the mobile terminal 100.

It can be understood that when a part of the second connecting plate 42 protrudes into the first gap between the main circuit board 2 and the device 1 to facilitate the connection of the first connecting board 41 to the main circuit board 2 At this time, the wiring surface 420 of the second connecting plate 42 that protrudes into the first slit faces the upper side 121. When a portion of the second connecting plate 42 extends into the second gap between the auxiliary circuit board 3 and the device 1 to facilitate the connection of the third connecting plate 43 to the auxiliary circuit board 3, The wiring surface 420 of the second connection plate 42 of the second slit is disposed facing the lower side surface 122.

It can be understood that the device 1 can be any component disposed between the main circuit board 2 and the auxiliary circuit board 3. The present application is described by taking the device 1 as a battery. In the thickness direction X of the mobile terminal 100, the size of the second connecting plate 42 is less than or equal to the size of the device 1, thereby preventing the second connecting plate 42 from increasing the overall thickness of the mobile terminal 100.

Optionally, between the routing surface 420 of the second connecting plate 42 and the side of the circumferential side surface 12 adjacent to the second connecting plate 42 (for example, the left side surface 123 or the right side surface 124) In a substantially parallel manner, the space occupied by the second connecting plate 42 in the width direction Y of the mobile terminal 100 is small, which is advantageous for reasonably controlling the overall width dimension of the mobile terminal 100.

In other embodiments, the wiring surface 420 of the second connecting plate 42 and the side of the circumferential side surface 12 adjacent to the second connecting plate 42 (for example, the left side surface 123 or the right side surface 124) An angle of less than or equal to 15° may be formed to reduce the assembly difficulty of the mobile terminal 100.

Optionally, the first connecting plate 41 and the second connecting plate 42 form a folded structure. In other words, the first connecting plate 41 is folded over the second connecting plate 42 , and the wiring surface of the first connecting plate 41 (the surface for arranging the conductive traces) is not parallel to the second connecting plate The wiring surface 420 of 42. At this time, the first connecting plate 41 can be smoothly overlapped on the surface of the main circuit board 2 (for example, the surface 21 for carrying components). The wiring surface of the first connection board 41 may be substantially parallel to the surface of the main circuit board 2 to reduce the assembly process difficulty of the first circuit board 4 and the main circuit board 2.

The end of the first connecting plate 41 away from the second connecting plate 42 can be connected to the main circuit board 2 through a connector 411. The connector 411 can be a ZIF (Zero Insertion Force) connector or a BTB (Board to Board) connector.

Optionally, the third connecting plate 43 and the second connecting plate 42 form a folded structure. In other words, the third connecting plate 43 is folded over the second connecting plate 42 , and the wiring surface of the third connecting plate 43 (the surface for arranging the conductive traces) is not parallel to the second connecting plate The wiring surface 420 of 42. At this time, the third connecting plate 43 can be smoothly overlapped on the surface of the auxiliary circuit board 3 (for example, the surface 31 for carrying components). The wiring surface of the third connection board 43 may be substantially parallel to the surface of the auxiliary circuit board 3 to reduce the assembly process difficulty of the third circuit board 7 and the auxiliary circuit board 3.

The end of the third connecting plate 43 away from the second connecting plate 42 can be connected to the auxiliary circuit board 3 through a connector 431. The connector 431 can be a ZIF (Zero Insertion Force) connector or a BTB (Board to Board) connector.

Optionally, the first circuit board 4 is a two-layer board or a multi-layer board. The number of layers of the first circuit board 4 can be set according to transmission requirements.

Referring to FIG. 6 to FIG. 10 together, as an optional embodiment, the second connecting board 42 includes a first sub-connecting board 421 and a second sub-layer which are stacked in the width direction Y of the mobile terminal 100. Connection plate 422. The two ends 4211 of the first sub-connecting board 421 are respectively connected to the two ends 4221 of the second sub-connecting board 422. At this time, the first sub-connecting board 421 An intermediate section 4212 (connected between the two ends 4211 of the first sub-connecting board 421) and an intermediate section 4222 of the second sub-connecting board 422 (connected at both ends 4221 of the second sub-connecting board 422) The hollowed-out arrangement between the two is not connected to each other, thereby facilitating the folding and forming of the second connecting plate 42. The layer structure of the first sub-connecting plate 421 and the second sub-connecting plate 422 is the same as that of the first connecting plate 41.

In this embodiment, the conductive traces of the second connecting plate 42 may be arranged in the first sub-connecting board 421 and the second sub-connecting board 422, that is, the first sub-connecting board. Both the 421 and the second sub-connecting board 422 can realize signal transmission, so even if the size of the second connecting board 42 in the thickness direction X of the mobile terminal 100 is limited, the second connecting board 42 can be The transmission capability of the second connection board 42 is ensured or improved by increasing the number of routing layers in the width direction Y of the mobile terminal 100.

It can be understood that the second connecting plate 42 further includes an end connecting plate 423 for connecting the two ends 4211 of the first sub-connecting board 421 and the two ends of the second sub-connecting board 422 in a one-to-one correspondence. 4221, the end connecting plate 423 is integrally formed with the first sub-connecting plate 421 and the second sub-connecting plate 422.

Optionally, the first circuit board 4 can be a flexible circuit board, a hard and soft combination circuit board, or a rigid circuit board. When the first circuit board 4 is a flexible circuit board, a gap may be formed in an intermediate portion of the second connecting board 42 and then folded along the slit to form a first sub-connecting board 421 and a second sub-connecting board which are stacked. 422.

Optionally, the second connecting plate 42 further includes a third sub-connecting plate 424, and the third sub-connecting plate 424 is stacked with the second sub-connecting plate 422. The third sub-connecting board 424 is disposed on a side of the second sub-connecting board 422 away from the first sub-connecting board 421, and two ends 4241 of the third sub-connecting board 424 are respectively connected to the second sub-board Both ends 4221 of the connection plate 422 are connected. At this time, the conductive traces of the second connecting plate 42 may be arranged in the first sub-connecting board 421, the second sub-connecting board 422, and the third sub-connecting board 424.

Optionally, one end of the first sub-connecting board 421 is connected to the first connecting board 41, and one end of the second sub-connecting board 422 away from the first connecting board 41 is connected to the third connecting board 43. Since the two ends 4211 of the first sub-connecting board 421 are respectively connected to the two ends 4221 of the second sub-connecting board 422, the first connecting board 41 connected to one end of the first sub-connecting board 421 can be The first sub-connecting board 421 and the second sub-connecting board 422 transmit signals, and the third connecting board 43 connected to one end of the second sub-connecting board 422 can pass the first sub-connecting board The 421 and the second sub-connector 422 transmit signals.

In this embodiment, after the first circuit board 4 is flattened, the first connecting plate 41, the second connecting plate 42 and the third connecting plate 43 substantially form a zigzag plate, which is beneficial to improve The board utilization rate reduces the cost of the first circuit board 4.

Referring to FIG. 2 to FIG. 12 together, as an optional embodiment, the mobile terminal 100 further includes a second circuit board 5. The second circuit board 5 includes a first segment 51, a second segment 52, and a third segment 53 that are integrally formed and sequentially connected. The main circuit board 2 is provided with a radio frequency circuit 22, and the auxiliary circuit board 3 is provided with an antenna feed point 23, and the first segment 51 is connected to the main circuit board 2 to be electrically connected to the radio frequency circuit 22. The third segment 53 is connected to the auxiliary circuit board 3 to be electrically connected to the antenna feed point 23, and the second segment 52 is disposed around the circumferential side surface 12.

It can be understood that the second circuit board 5 can adopt the same or similar structure as the first circuit board 4, and the first segment 51 can adopt the same or similar structure as the first connecting board 41. The second segment 52 may adopt the same or similar structure as the second connecting plate 42, and the third segment 53 may adopt the same or similar structure as the third connecting plate 43.

In this embodiment, since the second circuit board 5 is used to connect the RF circuit 22 board and the antenna feed point 23, The radio frequency line of the antenna component of the mobile terminal 100 is arranged on the second circuit board 5, and the impedance of the radio frequency line is controlled by the stacking arrangement and the routing setting of the second circuit board 5, thereby eliminating the same The shaft cable reduces the overall thickness of the mobile terminal 100.

Optionally, the second circuit board 5 further includes a fourth segment 54 and a fifth segment 55. The fourth segment 54 is connected to one end of the second segment 52 connected to the first segment 51, and the fourth segment 54 is spaced apart from the first segment 51. The fifth segment 55 is connected to one end of the second segment 52 connected to the third segment 53 , and the fifth segment 55 is spaced apart from the third segment 53 . The fourth segment 54 is connected to the main circuit board 2, and the fifth segment 55 is connected to the auxiliary circuit board 3. The fourth segment 54 may adopt the same or similar structure as the first segment 51, and the fifth segment 55 may adopt the same or similar structure as the third segment 53.

In the present embodiment, the fourth segment 54 and the first segment 51 are isolated from each other for connection to different positions or devices of the main circuit board 2, the fifth segment 55 and the third segment The 53 are isolated from each other for connection to different locations or devices of the sub-board 3, so that the second board 5 can simultaneously be used to transmit different signals.

It can be understood that the first segment 51, the third segment 53, the fourth segment 54 and the fifth segment 55 form a folded structure between the second segment 52 and the second segment 52, and can be optimized. The positional layout of the folded structure of the second circuit board 5 realizes the layout of the multilayer circuit board in a limited space, so that the second circuit board 5 realizes stronger signal transmission capability and optimizes the internal structure of the mobile terminal 100. Arrange.

Optionally, the second segment 52 includes a first trace 521 and a second trace 522 that are isolated from each other, and the first trace 521 connects the first segment 51 and the third segment 53, A second trace 522 connects the fourth segment 54 and the fifth segment 55. At this time, the first trace 521 and the second trace 522 can be used to transmit different signals. For example, the first trace 521 can be used to transmit an antenna signal, and the second trace 522 can be used to transmit a power signal between the main circuit board 2 and the auxiliary circuit board 3, and the first The circuit board 4 can only be used to transmit data signals (including control signals) between the main circuit board 2 and the sub-board 3, thereby reducing the transmission requirements for the first circuit board 4. In other words, different signals can be transmitted in a single circuit board (for example, the first circuit board 4 and the second circuit board 5) of the present application, and signals with higher transmission requirements can be divided into different boards. Therefore, the circuit board layout of the mobile terminal 100 is more flexible, and the signal transmission requirement of the mobile terminal 100 can be more reasonably satisfied.

Optionally, the first segment 51 is connected to the main circuit board 2 through a first connector 511, and the fourth segment 54 is connected to the main circuit board 2 through a second connector 541. The type of the first connector 511 is different from the type of the second connector 541. Since the first segment 51 and the fourth segment 54 are used to transmit different signals, the connection can be better achieved by connecting through different types of connectors. Of course, in other embodiments, the type of the first connector 511 and the type of the second connector 541 may also be the same.

Optionally, the second segment 52 is disposed on the second connecting plate 42 . At this time, the second circuit board 5 and the first circuit board 4 are substantially stacked, and the second circuit board 5 and the first circuit board 4 are disposed on the same side of the device 1 so as to be sufficient The internal space of the mobile terminal 100 is utilized. Of course, in other embodiments, the second segment 52 and the second connecting plate 42 may also be disposed on opposite sides of the device 1, for example, the routing surface of the second segment 52 faces the left The side surface 123 is disposed, and the wiring surface 420 of the second connecting plate 42 is disposed facing the right side surface 124.

Referring to FIG. 1 to FIG. 9 together, as an optional embodiment, the mobile terminal 100 further includes a display screen 6 and a third circuit board 7, and the display screen 6 is stacked with the device 1, and the The display surface of the display screen 6 is substantially parallel to the two surfaces 11. The display screen 6 includes a display panel 61 and a flexible circuit board 62 electrically connected to the display panel 61, the flexibility The circuit board 62 is electrically connected to the sub-board 3. The third circuit board 7 includes an integrally formed first portion 71, a second portion 72, and a third portion 73. The first portion 71 is connected to the main circuit board 2, and the third portion 73 is connected to the auxiliary circuit board. 3 is electrically connected to the flexible circuit board 62, and the second portion 72 is disposed around the circumferential side 12. In the embodiment, the third circuit board 7 is used to implement communication between the main circuit board 2 and the display panel 61.

It can be understood that the third circuit board 7 can adopt the same or similar structure as the first circuit board 4, and the first portion 71 can adopt the same or similar structure as the first connecting board 41, The second portion 72 may adopt the same or similar structure as the second connecting plate 42, and the third portion 73 may adopt the same or similar structure as the third connecting plate 43.

Optionally, the mobile terminal 100 further includes a cover 8 attached to a surface of the display screen 6 remote from the device 1. The cover plate 8 is a transparent hard plate member, so that the internal components of the mobile terminal 100 (for example, the display screen 6) can be well protected, and a good light transmission effect can be achieved. The cover plate 8 can be a glass cover plate 8.

Optionally, the display screen 6 can adopt an In-cell type touch screen (refer to a structure in which a touch panel function is embedded in a liquid crystal pixel) or an On-cell type touch screen (refer to embedding a touch panel function into a color filter) The structure between the substrate and the polarizing plate). In other embodiments, the display screen 6 can also be formed by an external touch screen, that is, a touch panel and a display panel 61 are disposed, and the touch panel is disposed on the cover 8 and the display panel 61. The touch circuit layer (the circuit layer for sensing the gesture of the user) of the touch panel may be formed on the cover 8 such that the touch panel and the cover 8 form an integrated structure, The display screen 6 forms an integrated structure with the cover plate 8.

Optionally, the second portion 72 and the second connecting plate 42 are respectively disposed on two sides of the device 1. At this time, the third circuit board 7 and the first circuit board 4 are respectively disposed on opposite sides of the device 1 to fully utilize the internal space of the mobile terminal 100. Of course, in other embodiments, the second portion 72 may also be stacked with the second connecting plate 42.

In an embodiment, the second connecting plate 42 is disposed to fit the circumferential side 12 . At this time, the first circuit board 4 is partially disposed to fit the device 1, and the space between the first circuit board 4 and the device 1 can be omitted, thereby reducing the overall width of the mobile terminal 100. . When assembled, the first circuit board 4 and the device 1 may be assembled together, and then the first circuit board 4 and the main circuit board 2 and the auxiliary circuit board 3 are connected.

Optionally, the second segment 52 of the second circuit board 5 is disposed to fit the second connecting plate 42. The third circuit board 7 and the first circuit board 4 are respectively disposed on opposite sides of the device 1, and the third circuit board 7 is disposed on the circumferential side 12 of the device 1.

In another embodiment, the mobile terminal 100 further includes a housing 9 , and the device 1 and the first circuit board 4 are both disposed inside the housing 9 . The housing 9 can include a front housing and/or a rear housing. The second connecting plate 42 is disposed to fit the inner wall of the casing 9. At this time, the first circuit board 4 is partially disposed on the inner wall of the casing 9, and the space between the first circuit board 4 and the casing 9 can be omitted, thereby reducing the mobile terminal 100. The width of the whole machine. When assembled, the first circuit board 4 can be assembled with the housing 9 and then the device 1 can be loaded into the interior of the housing 9.

Optionally, the second circuit board 5 and the third circuit board 7 are both disposed inside the housing 9 . The second segment 52 of the second circuit board 5 is disposed to fit the second connecting plate 42. The third circuit board 7 and the first circuit board 4 are respectively disposed on opposite sides of the device 1, and the third circuit board 7 is disposed on the inner wall of the housing 9.

Claims

A mobile terminal, comprising: a device, a main circuit board, a sub-board, and a first circuit board, the first circuit board including a first connecting board, a second connecting board, and a third integrally formed and sequentially connected a connection board, the first connection board is connected to the main circuit board, the third connection board is connected to the auxiliary circuit board, and the device comprises two opposite surfaces and is connected between the two surfaces The side surface, the main circuit board, the second connection board, and the auxiliary circuit board are disposed around the circumferential side, and the wiring surface of the second connection board is disposed facing the circumferential side.
The mobile terminal of claim 1, wherein the first connecting plate and the second connecting plate form a folded structure.
A mobile terminal according to claim 2, wherein said first connecting plate overlaps a surface of said main circuit board.
The mobile terminal according to any one of claims 1 to 3, wherein the second connecting board comprises a first sub-connecting board and a second sub-connecting board which are stacked, and two of the first sub-connecting boards The ends are respectively connected to both ends of the second sub-connecting board.
The mobile terminal according to claim 4, wherein the second connecting board further comprises a third sub-connecting board, the third sub-connecting board and the second sub-connecting board are stacked, the third The sub-connecting plate is disposed between a side of the second sub-connecting board away from the first sub-connecting board or between the second sub-connecting board and the first sub-connecting board.
The mobile terminal according to claim 4, wherein one end of the first sub-connecting board is connected to the first connecting board, and the second sub-connecting board is connected to one end of the first connecting board The third connecting plate.
The mobile terminal according to any one of claims 1 to 6, wherein the mobile terminal further comprises a second circuit board, wherein the second circuit board comprises a first segment and a second segment which are integrally formed and sequentially connected And a third stage, the main circuit board is provided with a radio frequency circuit, the auxiliary circuit board is provided with an antenna feeding point, and the first section is connected to the main circuit board to be electrically connected to the radio frequency circuit, The third segment connects the auxiliary circuit board to be electrically connected to the antenna feed point, and the second segment is disposed around the circumferential side.
A mobile terminal according to claim 7, wherein said second circuit board further comprises a fourth segment and a fifth segment, said fourth segment being connected to said second segment connecting one end of said first segment The fourth segment is spaced apart from the first segment, the fifth segment is connected to one end of the second segment connected to the third segment, and the fifth segment is spaced apart from the third segment, The fourth segment is connected to the main circuit board, and the fifth segment is connected to the auxiliary circuit board.
The mobile terminal of claim 8, wherein the second segment comprises a first trace and a second trace isolated from each other, the first trace connecting the first segment and the third a segment, the second trace connecting the fourth segment and the fifth segment.
The mobile terminal according to claim 8 or 9, wherein the first segment is connected to the main circuit board through a first connector, and the fourth segment is passed between the main circuit board and the main circuit board. The second connector is connected, the type of the first connector being different from the type of the second connector.
The mobile terminal according to any one of claims 7 to 10, wherein the second segment and the second connecting plate are stacked.
The mobile terminal according to any one of claims 1 to 11, wherein the mobile terminal further comprises a display screen and a third circuit board, wherein the display screen is stacked with the device, and the display screen comprises a display Panel and electrical connection a flexible circuit board of a display panel, the flexible circuit board electrically connecting the auxiliary circuit board, the third circuit board including an integrally formed first portion, a second portion, and a third portion, the first portion connecting the main portion a circuit board, the third portion is connected to the auxiliary circuit board to be electrically connected to the flexible circuit board, and the second portion is disposed around the circumferential side.
The mobile terminal of claim 12, wherein the second portion and the second connecting plate are respectively disposed on both sides of the device.
The mobile terminal according to any one of claims 1 to 13, wherein the second connecting plate is disposed to be attached to the peripheral side.
The mobile terminal according to any one of claims 1 to 13, wherein the mobile terminal further comprises a housing, and the device and the first circuit board are both disposed inside the housing, the Two connecting plates are disposed to fit the inner wall of the housing.