CN111478021A

CN111478021A - Antenna device and mobile terminal

Info

Publication number: CN111478021A
Application number: CN202010272873.3A
Authority: CN
Inventors: 陈卫; 马妮娜; 张攀
Original assignee: Huizhou TCL Mobile Communication Co Ltd
Current assignee: Huizhou TCL Mobile Communication Co Ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-07-31

Abstract

The embodiment of the application provides an antenna device and a mobile terminal. Wherein, antenna device includes: the antenna comprises a front shell, a mainboard, an antenna small plate, an antenna radiator, a feed point elastic sheet and a grounding elastic sheet, wherein the mainboard, the antenna small plate, the antenna radiator, the feed point elastic sheet and the grounding elastic sheet are arranged in the front shell; the feed point elastic sheet is arranged on the antenna small plate and used for connecting a feed line on the antenna small plate and an antenna radiator; the grounding elastic sheet is arranged on the front shell, the first end of the grounding elastic sheet is connected to a grounding point on the front shell, and the second end of the grounding elastic sheet is connected to the antenna radiator; the grounding point on the front shell is connected with the grounding wire of the main board. According to the embodiment of the application, the connection mode of the antenna grounding is improved, the yield of the antenna grounding is improved, the current return path is shortened, and the antenna performance and the overall performance of the mobile terminal are improved.

Description

Antenna device and mobile terminal

Technical Field

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

Background

At present, the antenna radiator is all through the shell fragment receive the antenna platelet earlier on, then the antenna platelet ground connection on the shell before with the cell-phone, through the GND of ground point reconnection mainboard, the circuit return path is very long, and the antenna platelet passes through the cotton or the electrically conductive cloth ground connection of electrically conductive bubble in addition, often has contact failure's problem, and the production stops the line when the volume production, consequence such as shipment delay.

Disclosure of Invention

The embodiment of the application provides an antenna device and a mobile terminal, and through improving the connection mode of antenna grounding, the yield of antenna grounding is improved, the current return path is shortened, and the antenna performance and the overall performance of the mobile terminal are improved.

The embodiment of the application provides an antenna device, which comprises a front shell, and a mainboard, an antenna small plate, an antenna radiator, a feed point elastic sheet and a grounding elastic sheet which are arranged in the front shell;

the feed point elastic sheet is arranged on the antenna small plate and used for connecting a feed line on the antenna small plate and the antenna radiator;

the grounding elastic sheet is arranged on the front shell, the first end of the grounding elastic sheet is connected to a grounding point on the front shell, and the second end of the grounding elastic sheet is connected to the antenna radiator;

and the grounding point on the front shell is connected with the grounding wire of the mainboard.

In the antenna apparatus of this embodiment, the feed point elastic piece is disposed at an edge of the antenna platelet.

In the antenna apparatus of this embodiment, a position of the grounding elastic piece corresponds to a grounding point on the front housing, and the grounding point on the front housing is disposed at any position on the front housing.

In the antenna device according to this embodiment, the front case includes a metal portion, and the ground point on the front case is disposed on the metal portion.

In the antenna apparatus of this embodiment, the front shell further includes a non-metal portion, and the ground spring is clamped on the non-metal portion of the front shell, wherein a first end of the ground spring is connected to a ground point disposed on the metal portion of the front shell.

In the antenna apparatus of this embodiment, the grounding elastic piece is fixed to the metal portion of the front housing by a screw.

In the antenna apparatus of this embodiment, the grounding elastic piece is welded to the metal portion of the front housing by spot welding.

In the antenna apparatus of this embodiment, the number of the grounding points of the grounding elastic piece is greater than or equal to 1.

In the antenna device according to this embodiment, the antenna radiator includes an FPC antenna or an L DS antenna.

The embodiment of the application further provides a mobile terminal, which comprises a shell and an antenna device, wherein the antenna device is installed inside the shell, and the antenna device is the antenna device in any one of the above embodiments.

The antenna device provided by the embodiment of the application comprises: the antenna comprises a front shell, a mainboard, an antenna small plate, an antenna radiator, a feed point elastic sheet and a grounding elastic sheet, wherein the mainboard, the antenna small plate, the antenna radiator, the feed point elastic sheet and the grounding elastic sheet are arranged in the front shell; the feed point elastic sheet is arranged on the antenna small plate and used for connecting a feed line on the antenna small plate and an antenna radiator; the grounding elastic sheet is arranged on the front shell, the first end of the grounding elastic sheet is connected to a grounding point on the front shell, and the second end of the grounding elastic sheet is connected to the antenna radiator; the grounding point on the front shell is connected with the grounding wire of the main board. The ground connection shell fragment of the embodiment of the application does not pass through the antenna platelet, but ground point on the shell before the lug connection, antenna radiator is connected to ground connection shell one end, ground point on the shell before the other end is connected, it passes through the antenna platelet to have solved ground connection shell fragment, thereby the antenna platelet is sending out the reliability problem when the volume production that the contact failure that produces through the ground connection of conductive bubble cotton or conductive cloth causes, cause the production to stop the line, the problem of shipment delay, through the connected mode of improving antenna ground connection, promote the yield of antenna ground connection, shorten the electric current return path, and promote the antenna performance and promote mobile terminal's wholeness ability.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

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

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

Fig. 3 is a schematic structural diagram of an antenna device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The embodiment of the application provides a mobile terminal. The mobile terminal can be a smart phone, a tablet computer, a smart watch and other devices. Referring to fig. 1 to 2, the mobile terminal 100 includes a cover plate 10, a display 20, an antenna device 30, a battery 40, and a case 50.

Wherein the cover plate 10 is mounted to the display screen 20 to cover the display screen 20. The cover plate 10 may be a transparent glass cover plate. For example, the cover plate 10 may be a glass cover plate made of a material such as sapphire.

The display screen 20 is mounted on the housing 50 to form a display surface of the mobile terminal 100. The display screen 20 may include a display area and a non-display area. The display area is used for displaying information such as images and texts. The non-display area does not display information. Functional components such as a fingerprint module, a touch circuit and the like can be arranged at the bottom of the non-display area.

For example, the display screen 20 may also be a full screen, with only display areas and no non-display areas. Wherein, functional components such as fingerprint module, touch-control circuit set up the below at the full screen. For example, the display screen 20 may also be a shaped screen.

Wherein the case 50 may form an outer contour of the mobile terminal 100. The cover plate 10 may be fixed to the case 50, and the cover plate 10 and the case 50 form a closed space to accommodate the display screen 20, the antenna device 30, the battery 40, and the like.

In some embodiments, the housing 50 may be made of a metal material such as magnesium alloy, stainless steel, etc. It should be noted that the material of the housing 50 according to the embodiment of the present application is not limited thereto, and other manners may also be adopted, for example, the housing 50 may include a non-metal portion and a metal portion. For example, the housing 50 may be a plastic housing. For example, the housing 50 may be a ceramic housing. For example, the housing 50 may be a metal and plastic mating housing structure. The shell 50 may be formed by cold working, hot working, injection molding, extrusion molding, press molding, blow molding, cast molding, and gas assist molding. For example, the shell 50 is made of aluminum or an aluminum alloy, and can be formed by cold working methods such as lathing, milling, planing, drilling, and drawing. For example, the housing 50 may be made of a non-metal material by a non-metal material molding method such as injection molding.

The antenna device 30 is installed in a closed space formed by a cover plate 10 and a housing 50, the antenna device 30 may include a front case 35, a main board 31, an antenna platelet 36, an antenna radiator 32, a feed point spring sheet 33 and a grounding spring sheet 34 which are arranged in the front case 35, the antenna radiator 32 may be an FPC antenna or an L DS antenna, L DS antenna technology, i.e., laser direct structuring technology, is to project laser on a L DS material housing and plate the laser on the surface into metal to form a three-dimensional antenna circuit pattern, so that the antenna may be directly formed on the housing surface, on one hand, the space of the mobile terminal is saved, the mobile terminal is designed to be thinner, on the other hand, the antenna is more stable, because there are no dimension and production line manual assembly errors like machining, the main board 31 may be a main board of the mobile terminal 100, which is an important element for providing electrical connection for each electronic component in the mobile terminal, and the main board 31 may be divided into a single panel, a double-sided board, a four-layer board, a six-layer board 31, a circuit board 31, a microphone module, a microphone, and a microphone module, wherein two antenna shell 35, a microphone, a.

Specifically, the feeding spring piece 33 is disposed at an edge position of the antenna small plate 36, the grounding spring piece 34 is disposed at a position corresponding to the grounding point 351 on the front shell 35, and the grounding point 351 on the front shell 35 is disposed at any position on the front shell 35. More specifically, the front case 35 includes a metal portion on which the ground point 351 on the front case 35 is provided. Since the grounding points 351 on the front case 35 may be disposed at any position on the front case 35, the number of the grounding points 351 of the grounding spring piece 34 is greater than or equal to 1. In addition, the front shell 35 further includes a non-metal portion, the grounding elastic sheet 34 is clamped on the non-metal portion of the front shell 35, for example, the grounding elastic sheet is clamped on an antenna bracket made of non-metal, wherein the first end 341 of the grounding elastic sheet 34 is connected with a grounding point 351 arranged on the metal portion of the front shell 35, the grounding elastic sheet 34 can be fixed on the metal portion of the front shell 35 through screws, can also be welded on the metal portion of the front shell 35 through spot welding, and can also be clamped on the antenna bracket, and the two sides of the grounding elastic sheet are respectively elastically sprung on the front shell 35 and the antenna FPC.

Wherein the battery 40 is installed in a sealed space formed by the cover plate 10 and the case 50, and the battery 50 is electrically connected to the antenna device 30 to supply power to the mobile terminal 100.

The embodiment of the application also provides an antenna device. Referring to fig. 3, the antenna device 30 includes a front case 35, and a main board 31, an antenna platelet 36, an antenna radiator 32, a feed point spring 33, and a ground spring 34 disposed in the front case 35;

the feed point elastic sheet 33 is arranged on the antenna platelet 36 and is used for connecting a feed line on the antenna platelet 36 and the antenna radiator 32;

the grounding elastic sheet 34 is disposed on the front shell 35, a first end 341 of the grounding elastic sheet 34 is connected to a grounding point 351 on the front shell 35, and a second end 342 of the grounding elastic sheet 34 is connected to the antenna radiator 32;

the grounding point 351 on the front case 35 is connected to the ground of the main board 31. The connection mode solves the problem that the grounding elastic sheet 34 is grounded through the antenna small plate 36, and the antenna small plate 36 is grounded through the conductive foam or the conductive cloth to cause poor contact, and the overall performance of the mobile terminal is improved.

In some embodiments, the feed spring 33 is disposed at an edge of the antenna platelet 36.

In some embodiments, the grounding spring 34 is disposed at a position corresponding to the grounding point 351 on the front housing 35, and the grounding point 351 on the front housing 35 is disposed at any position on the front housing 35.

For example, the grounding spring 34 may be designed near the feed point of the feed point spring 33 as in a conventional antenna design, or may be designed farther away from the feed point. Since the grounding spring 34 does not need to be designed on the antenna platelet 36, the freedom of selecting the position of the grounding point 351 is improved, and the grounding point can be designed at a position which cannot be selected by a conventional antenna, such as an edge or corner position of the front shell 35, and a narrow space. Such as the right side of a Speaker (Speaker), there is usually insufficient space for a flip antenna platelet 36, but only one ground flip 34. Meanwhile, the distance between the grounding point 351 and the feed point of the feed point elastic sheet 33 is increased, so that some unconventional antenna wiring designs can be realized more easily, and the design freedom of the antenna is improved. Such as a loop antenna, the antenna is routed from the feed point to form an S-shape or an 8-shape, and finally connected to the grounding spring 34. Many wires are needed between the feed point spring piece 33 and the grounding spring piece 34, and a certain distance is needed. The implementation of medium to high frequencies in an antenna design relies primarily on the routing path between the feed point and the ground point 351. The distance between the feed point and the grounding point 351 is pulled open, which is beneficial to designing a more complex wiring mode, and is beneficial to realizing the medium-high frequency and wider bandwidth and the better performance. This way of grounding also allows for more grounding locations at the same time, e.g. a conventional design typically only has 1 to 2 grounding points 351, since it is only possible to arrange at the edge of the antenna platelet 36, and there is typically no more space and locations to implement more grounding points 351. In this way, the grounding position is not limited, and more than 2 grounding points 351 can be realized on the same antenna, so that more complicated antenna wiring design can be realized, and wider antenna bandwidth can be realized.

In some embodiments, the front housing 35 includes a metal portion on which the grounding points 351 of the front housing 35 are disposed, for example, the front housing 35 is composed of an alloy and a plastic, the alloy is designed to be a part of the housing and is produced and then injection molded into the plastic of the front housing 35, in the structure of the mobile phone, a reinforcing steel plate made of the alloy is usually embedded in the housing of the front housing 35 to reinforce the structure of the mobile phone and protect L from being dropped and damaged, and the grounding points 351 are disposed on the reinforcing plate made of the alloy, wherein the reinforcing steel plate is the grounding terminal of the PCB (including the main board and the antenna small board).

In some embodiments, the front housing 35 further includes a non-metal portion, and the grounding elastic piece 34 is clamped on the non-metal portion of the front housing 35, wherein the first end 341 of the grounding elastic piece 34 is connected to the grounding point 351 disposed on the metal portion of the front housing 35. For example, the grounding spring 34 is clamped on the antenna bracket made of a non-metal part in the front housing 35, and the first end 341 of the grounding spring 34 is connected to the grounding point 351 provided on the metal part of the front housing 35.

In some embodiments, the grounding spring 34 is fixed on the metal part of the front shell 35 by screws.

In some embodiments, the grounding spring 34 is welded to the metal portion of the front shell 35 by spot welding.

In some embodiments, the grounding elastic sheet 34 may also be elastically attached to the front housing 35 and the antenna FPC respectively by being clamped to the antenna bracket.

In some embodiments, the number of the grounding points 351 of the grounding spring 34 is greater than or equal to 1. Because the grounding spring 34 of the conventional antenna design can only be arranged at the edge of the antenna platelet 36, there is usually no more space and positions to implement more grounding points 351, and in this way, since the grounding position is not limited, more than 2 grounding points 351 can be implemented on the same antenna.

In some embodiments, the antenna radiator 32 includes an FPC antenna or an L DS antenna, the L DS antenna technology, i.e., a laser direct structuring technology, is implemented by projecting laser on a L DS housing and then metallizing the surface of the housing to form a three-dimensional antenna circuit pattern, so that the antenna can be directly formed on the surface of the housing, which saves space of the mobile terminal, and makes the mobile terminal thinner in design, and is more stable because there are no dimension and production line manual assembly errors like machining.

In summary, the present embodiment provides an antenna device 30, which includes: the antenna comprises a front shell 35, and a mainboard 31, an antenna platelet 36, an antenna radiator 32, a feed point elastic sheet 33 and a grounding elastic sheet 34 which are arranged in the front shell 35; the feed point elastic sheet 33 is arranged on the antenna platelet 36 and used for connecting a feed line on the antenna platelet 36 and the antenna radiator 32; the grounding elastic sheet 34 is arranged on the front shell 35, a first end 341 of the grounding elastic sheet 34 is connected to a grounding point 351 on the front shell 35, and a second end 342 of the grounding elastic sheet 34 is connected to the antenna radiator 32; the ground point 351 on the front case 35 is connected to the ground line of the main board 31. The grounding elastic sheet 34 of the embodiment of the application does not pass through the antenna small plate 36, but the grounding point 351 on the front shell 35 is directly connected, the antenna radiator 32 is connected to one end of the grounding elastic sheet 34, the grounding point 351 on the front shell 35 is connected to the other end, the problem that the grounding elastic sheet 34 passes through the antenna small plate 36 is solved, thereby the antenna small plate 36 is further connected with the ground through the conductive foam or the conductive cloth, the problem of reliability is caused when the mass production is carried out, the production stop line is caused, the problem of delivery delay is solved, the connection mode through improving the antenna grounding is realized, the yield of the antenna grounding is improved, the current return path is shortened, and the antenna performance and the overall performance of the mobile terminal. Meanwhile, the number of grounding modes and grounding points 351 is greatly increased, the design of more complex antenna wiring is facilitated, and the mobile phone is more suitable for the mobile phone environment with high current integration level.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The antenna device and the mobile terminal provided in the embodiments of the present application are described in detail above, and a specific example is applied in the description to explain the principle and the implementation of the present application, and the description of the embodiments above is only used to help understand the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. An antenna device is characterized by comprising a front shell, a mainboard, an antenna small plate, an antenna radiator, a feed point elastic sheet and a grounding elastic sheet, wherein the mainboard, the antenna small plate, the antenna radiator, the feed point elastic sheet and the grounding elastic sheet are arranged in the front shell;

2. The antenna device of claim 1, wherein the feed spring is disposed at an edge of the antenna platelet.

3. The antenna device of claim 1, wherein the grounding spring is disposed at a position corresponding to a grounding point on the front housing, the grounding point on the front housing being disposed at any position on the front housing.

4. The antenna device of claim 3, wherein the front housing includes a metal portion on which a ground point on the front housing is disposed.

5. The antenna grounding device of claim 4, wherein the front housing further comprises a non-metallic portion, and the grounding spring is clamped on the non-metallic portion of the front housing, wherein a first end of the grounding spring is connected to a grounding point disposed on the metallic portion of the front housing.

6. The antenna device of claim 4, wherein the grounding spring is fixed to the metal portion of the front housing by screws.

7. The antenna assembly of claim 4 wherein said ground clip is spot welded to a metal portion of said front housing.

8. The antenna device of claim 1, wherein the number of grounding points of the grounding spring is greater than or equal to 1.

9. An antenna arrangement as claimed in claim 1, characterized in that the antenna radiator comprises an FPC antenna or an L DS antenna.

10. A mobile terminal, characterized in that it comprises a housing and an antenna device, said antenna device being mounted inside said housing, said antenna device being the antenna device of any of claims 1 to 9.