CN111864418B

CN111864418B - Conductive brush, antenna assembly and mobile terminal

Info

Publication number: CN111864418B
Application number: CN201910357015.6A
Authority: CN
Inventors: 杨和辉; 董力; 蔡明�
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2022-03-25
Anticipated expiration: 2039-04-29
Also published as: CN111864418A

Abstract

The embodiment of the application discloses a conductive brush, an antenna assembly and a mobile terminal, wherein the conductive brush is used for electrically connecting a circuit board and an antenna of the mobile terminal, and comprises 1 or more than 1 conductive plate and a plurality of elastic conductive fiber filaments; elastic conductive fiber silk includes stiff end and free end, elastic conductive fiber silk's stiff end is fixed on the current conducting plate, elastic conductive fiber silk's free end be used for with antenna contact electric connection, elastic conductive fiber silk receives produce first deformation during the first pressure of antenna first pressure disappears the back first deformation resumes. Therefore, the elastic conductive fiber wire is good in flexibility, can be bent along with the elastic conductive fiber wire after being subjected to pressure applied from the outside, is small in stress after being bent, avoids overlarge stress from damaging an antenna in contact with the elastic conductive fiber wire, can be scattered after being bent under pressure, increases contact area, and improves electric connection performance.

Description

Conductive brush, antenna assembly and mobile terminal

Technical Field

The embodiment of the application relates to the field of electronic devices, in particular to a conductive brush, an antenna assembly and a mobile terminal.

Background

With the explosive increase of information flow in the current society, people have higher and higher requirements on the communication capability of mobile terminals such as mobile phones, so more new frequency band antennas and MIMO antennas need to be added to the mobile terminals to meet the requirements. However, the area of the mobile terminal where the antenna is suitably placed is limited, and it is becoming less and less with the development of ID trend and display screen technology. It is therefore desirable for antenna designers to place the antenna on the back cover or cover over the display screen.

Traditional mobile terminal antenna is mostly through the connection of sheetmetal realization circuit board and antenna, for example, to the mobile terminal of placing the antenna on back lid or display screen apron, the one end and the antenna connection of setting on back lid or display screen apron of sheetmetal, the other end is connected with the circuit board, but, the reaction force of sheetmetal leads to back lid or display screen apron local deformation easily, perhaps comes unstuck and rises to stick up.

Disclosure of Invention

The embodiment of the application provides a conductive hairbrush, an antenna assembly and a mobile terminal, and solves the problem of local deformation of a rear cover or a display screen cover plate while realizing electric connection between a circuit board and an antenna in the mobile terminal.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect of the embodiments of the present application, a conductive brush is provided, where the conductive brush is used to electrically connect a circuit board and an antenna of a mobile terminal, and the conductive brush includes 1 or more conductive plates and a plurality of elastic conductive fiber filaments; elastic conductive fiber silk includes stiff end and free end, elastic conductive fiber silk's stiff end is fixed on the current conducting plate, elastic conductive fiber silk's free end be used for with antenna contact electric connection, elastic conductive fiber silk receives produce first deformation during the first pressure of antenna first pressure disappears the back first deformation resumes. Therefore, the elastic conductive fiber wire is good in flexibility, can be bent along with the elastic conductive fiber wire after being subjected to pressure applied from the outside, is small in stress after being bent, avoids overlarge stress from damaging an antenna in contact with the elastic conductive fiber wire, can be scattered after being bent under pressure, increases contact area, and improves electric connection performance.

In an optional implementation manner, the conductive plate is 1, and the fixed end of the elastic conductive fiber filament is fixed on the conductive plate through dispensing, bonding or welding. From this, this conductive brush adopts the individual layer conducting plate structure, and whole size is less, can practice thrift mobile terminal inner space, is favorable to the mobile terminal miniaturization.

In an optional implementation mode, the conducting plate includes first conducting plate and the second conducting plate of electricity connection, first conducting plate with contained angle between the second conducting plate is greater than 0 °, the stiff end of elasticity conductive fiber silk is fixed through bonding or welded mode on the first conducting plate, the second conducting plate is fixed on the circuit board. Therefore, the conductive brush can connect the circuit boards and the antennas in different directions, the connection mode is more flexible, and the universality is better.

In an optional implementation mode, the conducting plate includes first conducting plate and the second conducting plate of electricity connection, first conducting plate with contained angle between the second conducting plate equals 0, be equipped with the hole on the first conducting plate, the stiff end of elasticity conductive fiber silk is passed and is fixed in behind the hole first conducting plate with between the second conducting plate. Therefore, the conductive brush adopts a double-layer conductive plate structure, and elastic conductive fiber yarns can be better fixed.

In an alternative implementation, the first and second conductive plates include opposing first and second surfaces, respectively, the second surface of the first conductive plate opposing the first surface of the second conductive plate; the fixed end of elasticity conductive fiber silk is followed hole circumference evenly distributed is in the second surface of first current conducting plate with between the first surface of second current conducting plate. Therefore, the conductive brush has more uniform overall thickness and is convenient to assemble.

In an optional implementation manner, the fixed end of the elastic conductive fiber filament is fixed between the first conductive plate and the second conductive plate by means of dispensing. Therefore, after the elastic conductive fiber is positioned, the glue solution flows between the first conductive plate and the second conductive plate along the root of the elastic conductive fiber in a dispensing mode, and the operation is simpler.

In an alternative implementation, the shape of the aperture is a regular rectangle, square, circle, oval, ring, or irregular shape. Therefore, the conductive brushes with different shapes can be designed according to the space shape of the conductive brush or the shape of the contact area of the antenna, the shapes are more diversified, and the conductive brush can adapt to more structures.

In an optional implementation manner, the number of the holes is 1 or more than 1, the holes are uniformly distributed on the first conductive plate, and a plurality of elastic conductive fiber filaments are arranged in each hole to form a bundle-shaped structure. Therefore, the elastic conductive fiber tows can be assembled together by using the holes, and the elastic conductive fiber tows are prevented from being scattered.

In an optional implementation manner, the elastic conductive fiber wire is made of a carbon fiber wire or a metal wire, or a plastic fiber or a nylon fiber with a surface plated with a conductive material. The application does not limit the specific material of the elastic conductive fiber yarn. From this, the elasticity conductive fiber silk that adopts above-mentioned material is good and electric conductivity, and the stress that deformation produced is enough little when realizing the electricity connection function, can protect the product of using this conductive brush.

In a second aspect of the embodiments herein, there is provided an antenna assembly for a mobile terminal, the mobile terminal comprising a circuit board, the antenna assembly comprising an electrically conductive brush as described above, and an antenna; the conductive plate of the conductive brush is electrically connected with the circuit board of the mobile terminal; the free end of the elastic conductive fiber wire is electrically connected with the antenna contact, the elastic conductive fiber wire generates a first deformation when being subjected to a first pressure of the antenna, and the first deformation is recovered after the first pressure disappears. From this, this antenna module adopts above-mentioned conductive brush, can the contact of self-adaptation and the antenna of various angles, compares with adopting metal shrapnel, and conductive brush adaptability is better, has improved the stability of being connected electrically between antenna and the circuit board.

A third aspect of the embodiments of the present application provides a mobile terminal, including a housing, a middle frame, and the antenna assembly as described above, a circuit board is disposed on the middle frame, wherein the antenna is disposed on the housing, a conductive plate of the conductive brush is electrically connected to the circuit board, a free end of the elastic conductive fiber filament is electrically connected to the antenna contact, and the elastic conductive fiber filament generates a first deformation when receiving a first pressure of the antenna, and the first deformation is recovered after the first pressure disappears. The mobile terminal that this application embodiment provided replaces metal shrapnel through electrically conductive brush, and the stress that produces behind the elastic deformation is less, and is little to the reaction force of shell, can avoid the shell because of the too big lifting of coming unstuck that arouses of atress to improved the stability that sets up antenna on the shell and set up the circuit board electricity connection on the center. Meanwhile, the mobile terminal adopts the antenna assembly, when the shell provided with the antenna is combined with the middle frame of the mobile terminal, the conductive hairbrush can be in self-adaptive contact with antenna feed points at various angles, and compared with a metal elastic sheet, the conductive hairbrush has better adaptability and improves the stability of electric connection between the antenna and a circuit board.

In an alternative implementation manner, the conductive plate of the conductive brush is fixed on the circuit board by means of bonding or welding of a conductive adhesive. The present application does not limit the specific connection manner of the conductive plate and the circuit board. Therefore, the stability of the connection between the conductive brush and the circuit board is improved, and the electric connection performance is improved.

In an alternative implementation, the length of the elastic conductive fiber is greater than the distance between the antenna and the conductive plate in a state where the housing is combined with the middle frame, and the antenna is in contact with the side surface of the elastic conductive fiber in a state where the housing is combined with the middle frame. Therefore, the side face of the elastic conductive fiber yarn is electrically connected with the antenna feed point, the contact surface is larger, and the electrical connection performance is better.

In an alternative implementation, the length of the elastic conductive fiber wire is equal to the distance between the antenna and the conductive plate in the state that the housing is combined with the middle frame, and the antenna is in contact with the free end of the elastic conductive fiber wire in the state that the housing is combined with the middle frame. Thereby, the length of the elastic conductive fiber filament can be saved.

Drawings

Fig. 1 is an exploded view of a mobile terminal according to an embodiment of the present disclosure;

fig. 1a is a schematic structural diagram of a housing according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application;

fig. 3 is a schematic structural view of a conductive brush according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural view of another conductive brush according to an embodiment of the present disclosure;

FIG. 4a is a schematic structural view of another conductive brush according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of another mobile terminal according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another mobile terminal according to an embodiment of the present application;

FIG. 6a is an enlarged view of a portion 20 of FIG. 6;

fig. 7 is a diagram illustrating a deformation state of a conductive brush according to an embodiment of the present disclosure;

FIG. 8 is a diagram illustrating a deformed state of another conductive brush according to an embodiment of the present disclosure;

FIG. 9 is a diagram illustrating a deformed state of another conductive brush according to an embodiment of the present disclosure;

FIG. 10 is a diagram illustrating a deformed state of another conductive brush according to an embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a hole provided in an embodiment of the present application;

fig. 12 is a schematic structural diagram of another hole provided in the embodiment of the present application;

fig. 13 is a schematic structural diagram of another hole provided in the embodiment of the present application;

fig. 14 is a schematic structural diagram of another hole provided in the embodiment of the present application;

FIG. 15 is a schematic view of another embodiment of a conductive brush;

fig. 16 is a schematic structural diagram of a feed contact plate of a prior art antenna;

fig. 17 is a schematic structural diagram of a feed point contact plate of an antenna according to an embodiment of the present application;

FIG. 18 is a flowchart of a method for manufacturing a conductive brush according to an embodiment of the present disclosure;

fig. 18a, 18b, and 18c are schematic structural diagrams respectively obtained by performing the respective manufacturing steps shown in fig. 18.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings.

In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

Further, in the present application, directional terms such as "upper" and "lower" are defined with respect to a schematically-disposed orientation of components in the drawings, and it is to be understood that these directional terms are relative concepts that are used for descriptive and clarity purposes and that will vary accordingly with respect to the orientation in which the components are disposed in the drawings.

The embodiment of the application provides a conductive hairbrush, an antenna component comprising the conductive hairbrush and a mobile terminal comprising the antenna component. The conductive brush and the antenna assembly provided by the embodiment of the application can be applied to a mobile terminal. The mobile terminal may include a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), a vehicle-mounted computer, and the like. The embodiment of the present application does not specifically limit the specific form of the mobile terminal. Because embodiments of the mobile terminal include embodiments of the antenna assembly including embodiments of the conductive brush, the conductive brush and the embodiments of the antenna assembly including the conductive brush will not be separately described herein, but will be described in the context of application to a mobile terminal.

The mobile terminal provided by the embodiment of the application is convenient to understand. The following describes the mobile terminal provided in the embodiment of the present application with reference to fig. 1, fig. 1a, and fig. 2 as follows:

in which only a partial structure of the mobile terminal 10 is shown in fig. 1, 1a, and 2 for the sake of viewing, as shown in fig. 1 and 1a, the mobile terminal 10 includes, for example, a housing 102 for combining with the middle frame 105, a middle frame 105, and an antenna assembly.

The middle frame 105 is provided with a circuit board 103, for example.

The antenna assembly may include an antenna and a conductive brush 101, the antenna may be disposed on a housing 102 of the mobile terminal, and the housing 102 may include: rear cover 1024, bezel 1020, or cover 1026 of the display screen, i.e., the antenna may be disposed on rear cover 1024, bezel 1020, or cover 1026 of the display screen. The conductive brush 101 is disposed between the circuit board 103 and the antenna for electrically connecting the circuit board 103 and the antenna.

For example, fig. 3 is a schematic structural view of a conductive brush according to an embodiment of the present disclosure, as shown in fig. 3, the conductive brush 101 includes a conductive plate 1012 and a plurality of flexible conductive filaments 1011.

The elastic conductive fiber 1011 includes a fixed end and a free end, wherein the fixed end of the elastic conductive fiber 1011 is fixed on a conductive plate 1012, the conductive plate 1012 is fixed on the circuit board 103 and electrically connected to the circuit board 103, for example, and the free end of the elastic conductive fiber 1011 is used for electrically connecting to the antenna contact.

The elastic conductive fiber 1011 generates a first deformation when being subjected to a first pressure of the antenna, and the first deformation is recovered after the first pressure disappears.

The embodiment of the present application does not limit the specific structure of the conductive plate 1012, and in a specific implementation manner of the present application, the conductive plate is 1, and referring to fig. 3, the fixed end of the elastic conductive fiber 1011 is fixed on the conductive plate 1012.

Wherein the fixed end of the elastic conductive fiber filament can be directly fixed on one surface of the conductive plate by means including but not limited to bonding or welding. As shown in fig. 3, a hole 1013 may be formed in the conductive plate 1012 such that the fixed end of the elastic conductive fiber 1011 enters the hole 1013, and then the fixed end of the elastic conductive fiber 1011 may be fixed in the hole 1013 by dispensing. The bore 1013 may be a through bore or a blind bore.

The conductive plate 1012 includes, for example, a first surface and a second surface opposite to each other, and the fixed end of the elastic conductive fiber 1011 is fixed to the first surface of the conductive plate 1012, for example.

When the conductive brush is used, the second surface of the conductive plate 1012 is fixed on a circuit board and electrically connected to the circuit board, so that the free end of the elastic conductive fiber 1011 can be electrically connected to an antenna contact.

In another specific implementation of the present application, as shown in fig. 4, the conductive plate 1012 includes, for example, a first conductive plate 1014 and a second conductive plate 1015 that are adjacently disposed, that is, the included angle between the first conductive plate 1014 and the second conductive plate 1015 is 0 °. The first conductive plate 1014 is provided with a hole 1013, a fixed end of the elastic conductive fiber 1011 is fixed between the first conductive plate 1014 and the second conductive plate 1015 after passing through the hole 1013, and a free end of the elastic conductive fiber 1011 extends along the hole 1013 in a direction away from the first surface of the second conductive plate 1015.

The second conductive plate 1015 and the first conductive plate 1014 include opposing first and second surfaces, respectively, the first surface of the second conductive plate 1015 and the second surface of the first conductive plate 1014 opposing each other. The fixed ends of the elastic conductive fiber 1011 are uniformly distributed between the second surface of the first conductive plate 1014 and the first surface of the second conductive plate 1015 along the circumference of the bore 1013. Therefore, the conductive brush has more uniform overall thickness and is convenient to assemble.

When the conductive brush is used, the second conductive plate 1015 is fixed to a circuit board, for example, and is electrically connected to the circuit board. So that the free end of the elastic conductive filament 1011 can be electrically connected with the antenna contact.

In another specific implementation of the present application, the included angle between the first conductive plate 1014 and the second conductive plate 1015 is greater than 0 °. For example, as shown in fig. 4a, the first conductive plate 1014 and the second conductive plate 1015 form an angle of 90 °. The first conductive plate 1014 and the second conductive plate 1015 may be integrally formed, or may be separately formed and then fixed together by welding or bonding. The fixed end of the elastic conductive fiber 1011 is fixed to the first conductive plate 1014, and the second conductive plate 1015 is fixed to the circuit board 103. From this, through setting up first current conducting plate and the second current conducting plate that is located different planes, can couple together circuit board and the antenna that is located not equidirectional through electrically conductive brush, the connected mode is more nimble, and the commonality is better.

The embodiment of the present application does not limit the specific structure of the first conductive plate 1014 in this implementation, wherein, as shown in fig. 4a, the first conductive plate 1014 may be, for example, a single-layer plate structure, and the fixed end of the elastic conductive fiber 1011 may be fixed on the first conductive plate 1014 by, for example, bonding or welding. In addition, a hole may be formed in the first conductive plate 1014, so that the fixed end of the elastic conductive fiber 1011 enters the hole and then is fixed in the hole by dispensing. The holes can be through holes or blind holes. Of course, the first conductive plate 1014 may have a double-layer plate structure, such that the fixed end of the elastic conductive fiber 1011 is fixed between the two layers of the first conductive plate 1014 after the fixed end of the elastic conductive fiber 1011 enters the hole.

The free end of the elastic conductive fiber 1011 is detachably connected with the antenna. When the outer shell 102 and the middle frame 105 are in a combined state, the antenna arranged on the outer shell 102 is contacted with the free end of the elastic conductive fiber wire 1011, and the antenna is electrically connected with the circuit board 103 through the conductive brush 101. When the housing 102 and the middle frame 105 are separated, the antenna disposed on the housing 102 and the free end of the elastic conductive fiber 1011 are separated, and the electrical connection between the antenna and the circuit board is broken.

When the housing 102 and the middle frame 105 are combined, the antenna is contacted with the elastic conductive fiber 1011, which comprises: the antenna is in contact with the free end of the elastic conductive filament 1011 or the antenna is in contact with the side of the elastic conductive filament 1011.

If the length of the elastic conductive fiber wire is greater than the distance between the antenna and the conductive plate in the state that the shell is combined with the middle frame, the antenna is in contact with the side face of the elastic conductive fiber wire in the state that the shell is combined with the middle frame. Therefore, the side face of the elastic conductive fiber yarn is electrically connected with the antenna feed point, the contact surface is larger, and the electrical connection performance is better.

If the length of the elastic conductive fiber wire is equal to the distance between the antenna and the conductive plate in the state that the shell is combined with the middle frame, the antenna is in contact with the free end of the elastic conductive fiber wire in the state that the shell is combined with the middle frame. Thereby, the length of the elastic conductive fiber filament can be saved.

The embodiment of the application does not limit the position of the antenna in the mobile terminal and the selection of the conductive brush. Illustratively, in some implementations of the present application, the mobile terminal is shown in fig. 1, and the antenna is mounted on the rear cover 1024 opposite to the circuit board 103, and at this time, the rear cover 1024 and the circuit board 103 may be electrically connected by using a conductive brush as shown in fig. 3 or fig. 4, and when in use, the conductive plate 1012 of the conductive brush 101 may be fixed on the circuit board 103, and when the rear cover mounted with the antenna is combined with the middle frame 105, the antenna is opposite to the elastic conductive fiber and contacts with the free end of the elastic conductive fiber 1011, and the antenna is electrically connected to the circuit board through the conductive brush. The rear cover 1024 may be made of glass, plastic, ceramic, sapphire, or the like.

As shown in fig. 1, the antenna is disposed on the rear cover 1024 of the mobile terminal, the conductive brush 101 is opposite to the antenna, and at this time, the height of the conductive brush 101 is greater than or equal to the distance between the antenna and the circuit board 103 in the state that the housing 102 is combined with the middle frame 105, so that the elastic conductive fiber 1011 can contact with the feed point of the antenna in the state that the housing 102 provided with the antenna is combined with the middle frame 105 of the mobile terminal, so that the feed point of the antenna can be electrically connected with the circuit board 103 through the elastic conductive fiber 1011. In a specific implementation manner of the present application, the distance between the antenna and the circuit board 103 may be 0.2-2 mm, and the height of the conductive brush 101 is greater than or equal to 2 mm.

For another example, in some implementations of the present application, as shown in fig. 5, a ring of steps 1022 for installing a display screen cover is disposed inside a frame 1020 of the mobile terminal. A ring of the conductive brush 101 may be disposed on the step 1022, and the conductive brush 101 may be configured as shown in fig. 3 or 4, and when being installed, the conductive plate 1012 may be fixed on the step surface of the step 1022 facing the cover plate, so that the free end of the elastic conductive fiber filament extends away from the step surface. The cover of the display screen is, for example, mounted with an antenna (the cover of the display screen is not shown in fig. 5), the material of the cover includes, but is not limited to, glass, plastic, ceramic, sapphire, etc., and the frame adopts a conductive material including, but not limited to, metal. When the cover plate mounted with the antenna is mounted on the bezel, the antenna is in contact with the free end of the elastic conductive fiber 1011.

As shown in fig. 5, the antenna is disposed on the cover plate of the display screen, the conductive brush 101 is opposite to the antenna, at this time, the height of the conductive brush 101 is greater than or equal to the distance between the antenna and the step 1022 in the state that the housing 102 is combined with the middle frame 105, so that the elastic conductive fiber 1011 can contact with the feed point of the antenna in the state that the housing 102 provided with the antenna is combined with the middle frame 105 of the mobile terminal, so that the feed point of the antenna can be electrically connected to the circuit board 103 through the elastic conductive fiber 1011. In a specific implementation manner of the present application, the distance between the antenna and the step surface may be 0.2-2 mm, and the height of the conductive brush 101 is greater than or equal to 2 mm.

In addition, the application also provides a mobile terminal. Fig. 6 is a schematic structural diagram of another mobile terminal according to an embodiment of the present application. Fig. 6a is an enlarged view of a portion 20 of fig. 6. As shown in fig. 6 and 6a, the antenna is located on a frame 1020 of the mobile terminal, and a plane of the circuit board 103 is perpendicular to a plane of the frame 1020, that is, the antenna and the circuit board 103 are located on different planes, a conductive brush as shown in fig. 4a may be used to electrically connect the antenna and the circuit board 103, a conductive plate 1012 of the conductive brush 101 includes, for example, a first conductive plate 1014 and a second conductive plate 1015, when installed, the second conductive plate 1015 may be fixed on the circuit board 103 and electrically connected to the circuit board 103, the first conductive plate 1014 is fixedly connected to the second conductive plate 1015, and the first conductive plate 1011 is fixedly connected to a fixed end of the elastic conductive fiber filament 1011. At this time, the length of the elastic conductive fiber 1011 is greater than or equal to the distance between the antenna and the first conductive plate 1014 in the state where the bezel 1020 is coupled to the middle frame. Therefore, in a state that the frame 1020 provided with the antenna is combined with the middle frame 105 of the mobile terminal, the elastic conductive fiber 1011 can make contact with the feed point of the antenna, so that the feed point of the antenna can be electrically connected with the circuit board 103 through the elastic conductive fiber 1011 and the conductive plate 1012 in sequence.

In another implementation of the present application, a conductive plate of a conductive brush is fixed on a frame of the mobile terminal, and a free end of the elastic conductive fiber 1011 extends away from the conductive plate 1012. The antenna is located on the circuit board 103, and the free end of the elastic conductive fiber 1011 can be electrically connected to the circuit board 103 through a connection spring sheet, for example. The conductive plate 1012 in fig. 6a may serve as a connection spring to connect the antenna and the elastic conductive fiber 1011. The specific structure of the connecting elastic sheet can refer to the conductive plate 1012 in fig. 6a, and the connecting elastic sheet includes, for example, a first elastic sheet and a second elastic sheet, the first elastic sheet is fixed on the circuit board 103 and electrically connected to the antenna, the second elastic sheet is fixedly connected to the first elastic sheet, and the second elastic sheet is in contact with the free end of the elastic conductive fiber.

Therefore, the antenna can be arranged on the frame of the mobile terminal, and the frame of the mobile terminal can be fully utilized. Moreover, the conductive brush can connect the circuit boards and the antennas in different directions, so that the connection mode is more flexible and the universality is better.

The antenna is disposed at different positions of the housing 102 in the above case, but regardless of the position of the housing 102, when the housing 102 is close to the middle frame 105 and combined with the middle frame 105, the antenna disposed on the housing 102 may be in contact with the conductive brush 101. Fig. 7-9 illustrate the deformation of the elastic conductive filament 1011 when the antenna 1021 is in contact with the elastic conductive filament 101.

As shown in fig. 7, when the antenna 1021 contacts with the free end of the elastic conductive fiber 1011, the conductive brush 101 is not stressed, and the free end of the elastic conductive fiber 1011 is in an original state.

When the antenna 1021 is in contact with the free end of the elastic conductive fiber 1011, if the external force applies pressure to the housing, the external force may be transmitted to the elastic conductive fiber 1011 through the antenna 1021, wherein the external force may be in multiple directions, and when the external force sequentially passes through the housing and the antenna to reach the elastic conductive fiber 1011, the elastic conductive fiber 1011 bends accordingly.

Exemplarily, as shown in fig. 8, an external applied pressure is perpendicular to an end surface of the free end of the elastic conductive fiber 1011, when the pressure reaches the free end of the elastic conductive fiber 1011 through the antenna 1021, the elastic conductive fiber 1011 may be bent and deformed by the external force, when the pressure is further increased, the free end of the elastic conductive fiber 1011 may slide along the antenna, and further spread around a contact area between the antenna and the free end of the elastic conductive fiber, at this time, the side surface of the elastic conductive fiber 1011 is sufficiently contacted with the antenna 1021, and the contact area is increased.

For another example, as shown in fig. 9, when the pressure applied from the outside is parallel to the end surface of the free end of the elastic conductive fiber 1011, and reaches the free end of the elastic conductive fiber 1011 through the antenna 1021, the free end of the elastic conductive fiber 1011 can bend to one side by the external force, and when the pressure is further increased, the free end of the elastic conductive fiber 1011 can slide along the antenna and spread along the pressure direction, so that the side surface of the elastic conductive fiber 1011 is fully contacted with the antenna 1021, and the contact area is increased.

Alternatively, as shown in fig. 10, the pressure applied from the outside forms an angle with the end surface of the free end of the elastic conductive fiber 1011, the pressure can be decomposed into a component perpendicular to the end surface of the free end of the elastic conductive fiber 1011 and a component parallel to the extending direction of the free end of the elastic conductive fiber 1011, for example, when the pressure reaches the end surface of the free end of the elastic conductive fiber 1011 through the antenna 1021, the free end of the elastic conductive fiber 1011 can bend under the action of the pressure and spread along the direction of the pressure, so that the side surface of the elastic conductive fiber 1011 fully contacts with the antenna 1021.

Therefore, when the housing provided with the antenna 1021 is combined with the middle frame 105 of the mobile terminal, the conductive brush 101 can be in self-adaptive contact with antenna feed points at various angles, and compared with a metal elastic sheet, the conductive brush has better adaptability, and the stability of electric connection between the antenna feed points and a circuit board is improved. And, because the elastic conductive fiber yarn is easy to bend and scatter to the periphery along the contact position with the antenna after being subjected to external pressure, and the friction force of the contact position with the antenna is small, the friction loss is small, and compared with the metal elastic sheet adopted in the prior art, the friction loss of the antenna can be reduced, and the antenna is protected.

The embodiment of the application provides a mobile terminal, replace metal shrapnel through electrically conductive brush 101, this electrically conductive brush 101 adopts elasticity electrically conductive fiber silk electricity to connect antenna and circuit board, this elasticity electrically conductive fiber silk's pliability is good, can be crooked thereupon after receiving the external applied pressure, its crooked back stress is less, reaction force to shell 102 is little, can avoid shell 102 because of the too big deguming of arousing of atress warp, thereby the stability that antenna and circuit board 103 electricity that sets up on shell 102 are connected has been improved. And the elastic conductive fiber can be scattered after being pressed and bent, so that the contact area of the contact is increased, and the electric connection performance is improved.

The material and shape of the conductive plate 1012 are not limited in the embodiments of the present application. For example, the conductive plate 1012 is made of a conductive material, including but not limited to copper. The shape of the conductive plate 1012 includes, but is not limited to, a regular shape such as a square, a circle, an ellipse, a ring, and may be an irregular shape, and the conductive plate 1012 in this embodiment of the present application is shaped to match the feed point and the ground point of the antenna.

The embodiment of the present application does not limit the material and size of the elastic conductive fiber 1011, for example, the elastic conductive fiber 1011 may be made of a conductive material with good flexibility. For example, the material of the elastic conductive fiber 1011 includes, but is not limited to, carbon fiber or metal wire, or plastic fiber or nylon fiber with a surface plated with a conductive material. In an exemplary embodiment, the carbon fiber filaments may be prepared by adding carbon black and graphite to the fibers; the metal wire can be prepared by adding metal powder or metal compound into the fiber, or can be obtained by processing copper, gold or silver and other metals with good conductivity into a wire shape; the plastic fiber or nylon fiber with the surface plated with the conductive material can be obtained by plating the conductive material on the surface of the plastic fiber or nylon fiber in an electroplating or chemical plating mode. The size of the elastic conductive fiber filament in the embodiment of the application is related to the impedance of the antenna, and the elastic conductive fiber filament with a proper size can be selected according to the impedance of the antenna.

The shape and number of the holes 1013 are not limited in the embodiments of the present application. In a specific implementation manner of the present application, the number of the holes 1013 is, for example, 6, referring to fig. 3, and the holes 1013 are uniformly distributed on the first conductive plate 1014.

The shape of the hole 1013 may be regular rectangle, circle, ellipse or irregular shape, and since the diameter of each elastic conductive fiber 1011 is much smaller than the diameter of the hole 1013, a plurality of elastic conductive fiber 1011 may be bundled in each hole 1013 to form a plurality of separated bundle-like structures. As exemplified in fig. 11-14, a different shape of the bore 1013 is illustrated. Wherein:

the hole 1013 in fig. 11 is a circular shape, a plurality of elastic conductive threads 1011 are bound in the hole 1013, and the elastic conductive threads 1011 bound in the circular hole 1013 have a cylindrical shape as a whole.

The hole 1013 in fig. 12 is square, a plurality of elastic conductive fibers 1011 are bound in the hole 1013, and the elastic conductive fibers 1011 bound in the square hole 1013 have a cubic shape as a whole.

The hole 1013 in fig. 13 is an ellipse, a plurality of elastic conductive fibers 1011 are bound to the hole 1013, and the elastic conductive fibers 1011 bound to the ellipse hole 1013 are columnar in shape having an elliptical cross section as a whole.

The hole 1013 in fig. 14 is irregular, a plurality of elastic conductive fibers 1011 are bound in the hole 1013, and the elastic conductive fibers 1011 bound in the irregular hole 1013 are flush with each other at both ends and have an irregular cross section.

In another specific implementation manner of the embodiment of the present application, the number of the holes is 1, and referring to fig. 5 in particular, the conductive brush 101 is disposed along a frame, only a partial structure of the conductive brush 101 is shown in fig. 5, and the rest of the conductive brush 101 is not shown. The rest part of the conductive brush 101 and the local structure can enclose a closed ring, and the hole of the conductive brush 101 is a ring-shaped hole. The annular hole is bound with a plurality of elastic conductive fiber filaments, and the elastic conductive fiber filaments bound in the continuous annular hole can be arranged along the frame of the mobile terminal, so that continuous conduction is realized.

Alternatively, the hole 1013 may have the same shape as the conductive plate 1012, the size of the hole 1013 is slightly smaller than the size of the conductive plate 1012, and the elastic conductive fiber 1011 is bound in the hole 1013 in a planar structure, which is compared with the above-mentioned binding method of the holes 1013, and the binding method may bind more elastic conductive fiber 1011 without providing a plurality of spacing structures, increase the area of the end face of the elastic conductive fiber 1011, and make better contact with the antenna.

Therefore, the hole 1013 can bundle the elastic conductive fiber 1011 into a bundle structure of various shapes, can adapt to an antenna of any shape, and has a more flexible shape and easier processing than the metal elastic sheet in the prior art.

The application does not limit the specific application scene of the conductive brush in the intelligent terminal. In a specific implementation manner of the present application, the conductive brush can be used for an antenna ground connection. For example, the conductive plate of the conductive brush may be fixed to a circuit board, the antenna may be electrically connected to a free end of the elastic conductive fiber of the conductive brush through a ground feed point, and when the housing provided with the antenna is combined with the middle frame, the ground feed point of the antenna may be electrically connected to the circuit board through the conductive brush, thereby achieving grounding of the antenna. Of course, a feed point contact plate may be disposed on the antenna, and the ground feed point of the antenna may be electrically connected to the circuit board sequentially through the feed point contact plate and the conductive brush.

The feed point contact plate of the antenna may be, for example, a copper plate. The feed point contact plate includes, but is not limited to, being fixed to the antenna by means of soldering or by means of conductive adhesive bonding. The welding mode is reliable in connection and suitable for mass production, and the welding connection mode is usually adopted in the prior art. However, the feed point contact plate after welding is usually left with a welding spot, which is a pit on the feed point contact plate.

As shown in fig. 16, in the prior art, a metal spring is used to connect the feeding point contact board 104 of the circuit board and the antenna, in order to ensure the electrical connection performance of the feeding point contact board 104, a contact area 1032 that is large enough needs to be left on the feeding point contact board 104, and meanwhile, in order to avoid the poor contact between the metal spring and the feeding point contact board 104, the contact area 1032 of the metal spring on the feeding point contact board 104 needs to avoid the solder 1031, which wastes the space of the feeding point contact board 104, so that the size of the feeding point contact board 104 is too large, which is not favorable for the miniaturization of the mobile terminal.

To this end, the embodiment of the present application provides a new connection structure of a conductive brush, as shown in fig. 17, the conductive brush adopts a structure having only one conductive plate, the conductive plate can be fixed on a circuit board, in order to ensure the electrical connection performance of the feed point contact plate 104, a contact point contact area with the same size as that in fig. 16 can be set aside on the feed point contact plate 104, and the conductive brush 101 is electrically connected with the contact point contact area through an elastic conductive fiber wire. At this time, the welding spot 1031 in this application may be disposed in the contact area of the feeding point contact plate 104, and when the free end of the elastic conductive fiber filament is close to the feeding point contact plate 104 of the antenna, the elastic conductive fiber filament may extend into the concave pit of the welding spot 1031 to be in full contact with the concave pit of the feeding point contact plate, so that the welding spot area of the feeding point contact plate may be fully utilized. That is, the solder 1031 can be disposed in the contact area without additional solder area, so that the feed contact plate 104 can be reduced to the same size as the contact area 1032 in fig. 16, thereby reducing the size of the occupied space of the feed contact plate 104 and facilitating the miniaturization of the mobile terminal.

The mobile terminal that this application embodiment provided, when through electrically conductive brush 101 ground connection, the electrically conductive fiber silk of elasticity need not to avoid the solder joint on the feed point contact board, can be fully with the pit contact of solder joint department, has utilized the solder joint area on the feed point contact board to can reduce the size of feed point contact board, and then reduced the size of feed point contact board occupation space.

The embodiment of the present application does not limit the manufacturing method of the conductive brush 101, for example, as shown in fig. 18, the embodiment of the present application provides a method that:

s101, as shown in fig. 18a, the first conductive plate 1014 is provided with a hole 1013.

The first conductive plate 1014 may be provided with a hole 1013 by a sheet metal stamping process or a numerical control machining process, and the hole 1013 is used for bundling the elastic conductive fiber 1011.

The shape of the holes 1013 may be specifically a circle, an ellipse, a rectangle, a square, an irregular shape, or a continuous ring, and the number of the holes 1013 may be one or more.

S102, as shown in fig. 18b, passing a first end of the elastic conductive fiber 1011 through the hole 1013, and fixing a side of the elastic conductive fiber 1011 on the first conductive plate 1014 in a direction parallel to the first conductive plate 1014.

The first end of the elastic conductive fiber 1011 is, for example, a fixed end of the elastic conductive fiber 1011, and the second end of the elastic conductive fiber 1011 is, for example, a free end of the elastic conductive fiber 1011.

Before the first end of the elastic conductive fiber 1011 passes through the hole 1013, for example, a plurality of elastic conductive fiber 1011 may be bundled together, wherein the end surface shape of the bundled elastic conductive fiber 1011 is the same as the shape of the hole 1013.

After the first end of the elastic conductive fiber 1011 passes through the hole 1013, the first end of the elastic conductive fiber 1011 may be uniformly dispersed along the circumference of the hole 1013, and then the first end of the elastic conductive fiber 1011 may be primarily fixed on the first conductive plate 1014 by dispensing.

S103, as shown in fig. 18c, fixing the first conductive plate 1014 on the second conductive plate 1015, so that the first end of the elastic conductive fiber 1011 is fixed between the second conductive plate 1015 and the first conductive plate 1014.

The second conductive plate 1015 is fixed to the circuit board 103 of the mobile terminal, for example, and the first conductive plate 1014 can be fixed to the second conductive plate 1015 by means including, but not limited to, soldering or conductive adhesive bonding. The second conductive plate 1015, the first conductive plate 1014 and the elastic conductive fiber 1011 form a conductive brush.

The above-mentioned figures only show the process of disposing the elastic conductive fiber 1011 in one hole, and the method of disposing the elastic conductive fiber 1011 in the other holes can repeat step S102 in the above-mentioned method, which is not described again.

The conductive brush shown in fig. 4 can be manufactured by the above method, and the manufacturing methods of the conductive brush shown in fig. 3 and 15 refer to S101 and S102 in the above method, which is not described herein again. The method for manufacturing the conductive brush in fig. 4a can refer to S101 and S102 in the above method, and then, only one end of the first conductive plate 1014 and one end of the second conductive plate 1015 need to be fixedly connected, and the included angle between the first conductive plate 1014 and the second conductive plate 1015 is greater than 0 °.

The conductive brush can be used in a mobile terminal to electrically connect an antenna of the mobile terminal and a circuit board.

The method for manufacturing the conductive brush provided in the embodiment of the present application has the same technical effects as the conductive brush 101 provided in the foregoing embodiment, and details are not repeated herein.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A conductive brush is characterized in that the conductive brush is used for electrically connecting a circuit board and an antenna of a mobile terminal, and comprises 1 or more than 1 conductive plate and a plurality of elastic conductive fiber filaments;

the elastic conductive fiber wire comprises a fixed end and a free end, the fixed end of the elastic conductive fiber wire is fixed on the conductive plate, the conductive plate is electrically connected with the circuit board, the free end of the elastic conductive fiber wire is used for being electrically connected with the antenna in a contact manner, the elastic conductive fiber wire generates first deformation when being subjected to first pressure of the antenna, and the first deformation is recovered after the first pressure disappears;

the conducting plate comprises a first conducting plate and a second conducting plate which are electrically connected, and the included angle between the first conducting plate and the second conducting plate is larger than 0 degree;

the fixed end of elasticity conductive fiber silk is fixed through bonding or welded mode on the first current conducting plate, the second current conducting plate is fixed on the circuit board.

2. The conductive brush as claimed in claim 1, wherein the conductive plate is 1 piece, the conductive plate includes a first surface and a second surface opposite to each other, the fixed end of the elastic conductive fiber filament is fixed to the first surface of the conductive plate by bonding or welding, and the second surface of the conductive plate is fixed to the circuit board.

3. The conductive brush as claimed in claim 1, wherein the conductive plate includes a first conductive plate and a second conductive plate electrically connected to each other, an included angle between the first conductive plate and the second conductive plate is equal to 0 °, a hole is formed in the first conductive plate, a fixed end of the elastic conductive fiber is fixed between the first conductive plate and the second conductive plate after passing through the hole, and the second conductive plate is fixed to the circuit board.

4. The conductive brush of claim 3, wherein the first and second conductive plates include opposing first and second surfaces, respectively, the second surface of the first conductive plate opposing the first surface of the second conductive plate;

the fixed end of elasticity conductive fiber silk is followed hole circumference evenly distributed is in the second surface of first current conducting plate with between the first surface of second current conducting plate.

5. The brush as claimed in claim 3, wherein the fixed end of the elastic conductive fiber is fixed between the first conductive plate and the second conductive plate by dispensing, bonding or welding.

6. The conductive brush of claim 3, wherein the aperture is shaped as a regular rectangle, square, circle, oval, ring, or irregular shape.

7. The conductive brush as claimed in claim 3, wherein the number of the holes is 1 or more, the holes are uniformly distributed on the first conductive plate, and each hole is provided with a plurality of elastic conductive fiber filaments to form a bundle-like structure.

8. The conductive brush as claimed in any one of claims 1 to 7, wherein the elastic conductive fiber thread is made of a carbon fiber thread or a metal thread, or a plastic fiber or a nylon fiber coated with a conductive material.

9. An antenna assembly for a mobile terminal, the mobile terminal comprising a circuit board, the antenna assembly comprising the conductive brush of any one of claims 1-8, and an antenna;

the conductive plate of the conductive brush is electrically connected with the circuit board of the mobile terminal;

the free end of the elastic conductive fiber wire is electrically connected with the antenna contact, the elastic conductive fiber wire generates a first deformation when being subjected to a first pressure of the antenna, and the first deformation is recovered after the first pressure disappears.

10. A mobile terminal comprising a housing, a middle frame, and the antenna assembly of claim 9, wherein a circuit board is disposed on the middle frame, wherein the antenna is disposed on the housing, the conductive plate of the conductive brush is electrically connected to the circuit board, the free end of the elastic conductive fiber filament is electrically connected to the antenna contact, and the elastic conductive fiber filament generates a first deformation when subjected to a first pressure of the antenna, and the first deformation is recovered after the first pressure disappears.

11. The mobile terminal of claim 10, wherein the conductive plate of the conductive brush is fixed on the circuit board by means of bonding or soldering with a conductive adhesive.

12. The mobile terminal according to claim 10 or 11, wherein the length of the elastic conductive fiber is greater than a distance between the antenna and the conductive plate in a state where the housing is coupled to the middle frame, and the antenna is electrically connected in contact with a side surface of the elastic conductive fiber in the state where the housing is coupled to the middle frame.

13. The mobile terminal according to claim 10 or 11, wherein the length of the elastic conductive fiber wire is equal to a distance between the antenna and the conductive plate in a state where the housing is coupled to the middle frame, and the feed point of the antenna is in contact with a free end of the elastic conductive fiber wire in the state where the housing is coupled to the middle frame.