Antenna structure for all-metal rear cover and mobile terminal

Abstract

The utility model discloses an antenna structure used for an all-metal rear cover, the antenna structure is installed between a screen and a metal rear cover, the antenna structure comprises an antenna mainboard, the antenna mainboard is arranged in a rectangular plate structure, and the antenna mainboard comprises a first long side and a second long side which are symmetrical, and a first short side and a second short side which are symmetrical; a resonant cavity is formed between the antenna main board and the metal rear cover, and a non-conductive support used for supporting the antenna main board is installed in the resonant cavity. The first long edge is provided with an L-shaped bending part, and the L-shaped bending part is connected with the metal rear cover; one side, close to the first long edge, of the surface of the antenna main board is provided with an avoiding groove used for wire welding; and a plurality of grounding foams connected with the screen are symmetrically arranged on the surface of the antenna main board. According to the utility model, the problem of poor product structural strength caused by the existing antenna design scheme with an all-metal shell is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and in particular to an antenna structure for a full metal back cover and a mobile terminal. Background Art

[0002] Consumer terminal products adopt full metal shell design solutions based on heat dissipation, protection and aesthetics. The products all have WIFI functions, so WIFI antennas also need to be designed accordingly. In the full metal shell solution, it is common to reserve metal window solutions or metal disconnect solutions to design antennas, so as to achieve the purpose of improving antenna performance, but this affects the structural strength of the product and the product appearance ID. Utility Model Content

[0003] The main purpose of the utility model is to provide an antenna structure for a full metal back cover and a mobile terminal, aiming to solve the problem of poor product structural strength caused by the existing antenna design scheme of the full metal shell.

[0004] To achieve the above-mentioned purpose, the utility model proposes an antenna structure for an all-metal back cover, the antenna structure is installed between the screen and the metal back cover, the antenna structure includes an antenna mainboard, the antenna mainboard is arranged in a rectangular plate structure, including a symmetrical first long side and a second long side, and a symmetrical first short side and a second short side; a resonant cavity is formed between the antenna mainboard and the metal back cover, and a non-conductive bracket for supporting the antenna mainboard is installed in the resonant cavity; the first long side is provided with an L-shaped bending portion, and the L-shaped bending portion is connected to the metal back cover; the surface of the antenna mainboard is provided with a avoidance groove for welding wires on the side close to the first long side; the surface of the antenna mainboard is symmetrically provided with a plurality of grounding foams connected to the screen.

[0005] Optionally, the non-conductive bracket is configured as a PC one-piece structure.

[0006] Optionally, the non-conductive support is configured as a rectangular structure, and a avoidance step corresponding to the avoidance groove is provided on the non-conductive support.

[0007] Optionally, the surface of the non-conductive bracket is completely in contact with the bottom of the antenna mainboard.

[0008] Optionally, the avoidance groove is configured as a concave rectangular groove structure, and the concave height of the avoidance groove is configured to be 0.5 mm to 1 mm.

[0009] Optionally, two grounding foams are provided, and the two grounding foams are symmetrically arranged on both sides of the avoidance groove along the length direction of the first long side.

[0010] Optionally, the distance between any of the grounding foams and the first long side is set to 4.32 mm to 9.32 mm, and the distance between any of the grounding foams and the first short side or the second short side closest to it is set to 7.17 mm to 12.17 mm.

[0011] Optionally, the length of the first long side or the second long side is set to 49.15 mm to 54.15 mm.

[0012] Optionally, the length of the first short side or the second short side is set to 21.3 mm to 26.3 mm.

[0013] To achieve the above object, the utility model also provides a mobile terminal, comprising any of the above-mentioned antenna structures for a full metal back cover.

[0014] The beneficial effects of the utility model are: the traditional structure of disconnecting or opening a window on the metal back cover is eliminated, the antenna structure itself is improved, a cavity is formed between the antenna mainboard and the metal back cover to generate the western rating rate, the antenna mainboard is used as the main radiation unit of the antenna, and the antenna mainboard is set to a rectangular plate structure. The parameters of its long and short sides can be adjusted to adjust the resonant frequency of the antenna, and the grounding foam is used to complete the adjustment of the antenna frequency band, so that the antenna has good performance without changing the metal back cover structure, and the assembly is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the antenna installation structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the antenna structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the position relationship between the antenna and the foam of the utility model;

[0019] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0023] An embodiment of the present invention provides an antenna structure for a full metal back cover, referring to Figures 1 to 3 The antenna structure is installed between the screen 1 and the metal back cover 2, and the antenna structure includes an antenna mainboard 3, and the antenna mainboard 3 is arranged in a rectangular plate structure, including a symmetrical first long side 31 and a second long side 32, and a symmetrical first short side 33 and a second short side 34; a resonant cavity is formed between the antenna mainboard 3 and the metal back cover 2, and a non-conductive bracket 4 for supporting the antenna mainboard 3 is installed in the resonant cavity; the first long side 31 is provided with an L-shaped bending portion 35, and the L-shaped bending portion 35 is connected to the metal back cover 2; the surface of the antenna mainboard 3 is provided with a avoidance groove 36 for welding wires on the side close to the first long side 31; the surface of the antenna mainboard 3 is symmetrically provided with a plurality of grounding foams 5 connected to the screen 1.

[0024] The present embodiment eliminates the traditional structure of disconnecting or opening a window on the metal back cover 2, and improves the structure of the antenna itself. A cavity is formed between the antenna mainboard 3 and the metal back cover 2 to generate a frequency response. The antenna mainboard 3 serves as the main radiation unit of the antenna. By setting it as a rectangular plate structure and adjusting the parameters of its long and short sides, the resonant frequency of the antenna can be adjusted. In combination with the grounding foam 5, the adjustment of the antenna frequency band is completed, so that the antenna has good performance without changing the structure of the metal back cover 2, and the assembly is simple.

[0025] Specifically, in this embodiment, the antenna structure adopts an upper and lower two-part structure, the antenna mainboard 3 is the upper part, and the L-shaped bending part 35 is the lower part. The upper and lower parts are an integrated structure, which can be realized by using the existing FPC antenna or LDS antenna process. During installation, the antenna mainboard 3 is installed on the metal back cover 2. The antenna mainboard 3 is the main radiation unit of the antenna. A cavity is formed between the antenna mainboard 3 and the metal back cover 2. The cavity can generate a resonant frequency to achieve antenna performance. The L-shaped bending part 35 of the lower part is connected to the metal back cover 2 to achieve grounding. Specifically, the antenna mainboard 3 serves as the main radiation unit of the antenna, and its shape and size will affect the resonant frequency of the antenna. Therefore, in this embodiment, the antenna mainboard 3 is designed as a rectangular plate structure. The antenna of this embodiment serves as a WIFI antenna. The longer the long side and the short side of the antenna mainboard 3 are, the lower the resonant frequency of the antenna will be, and the shorter the long side and the short side of the antenna mainboard 3 are, the higher the resonant frequency of the antenna will be. The change of WIFI2.4G in the short side direction is greater than that of WIFI5G, and the change of WIFI5G in the long side direction is greater than that of WIFI2.4G. The appropriate long and short side sizes can be selected according to the needs of the mobile terminal. In this embodiment, the length of the first long side 31 or the second long side 32 is set to 49.15mm~54.15mm, and the length of the first short side 33 or the second short side 34 is set to 21.3mm~26.3mm.

[0026] Furthermore, the grounding foam 5 is the grounding area of ​​the antenna and the screen 1. The position of the grounding foam 5 can be selected according to the requirements of the mobile terminal. The grounding foam 5 moves close to the short side, and the resonance frequency of WIFI2.4 / 5 is biased toward high frequency, and vice versa. In this embodiment, the grounding foam 5 is set to two, and the two grounding foams 5 are symmetrically arranged on both sides of the avoidance groove 36 along the length direction of the first long side 31. The distance between any of the grounding foams 5 and the first long side 31 is set to 4.32mm~9.32mm, and the distance between any of the grounding foams 5 and the first short side 33 or the second short side 34 closest to it is set to 7.17mm~12.17mm.

[0027] Furthermore, in this embodiment, the non-conductive bracket 4 can effectively support the antenna mainboard 3 to ensure the stability of its installation. In this embodiment, the non-conductive bracket 4 is configured as a PC integrated structure.

[0028] Furthermore, the non-conductive bracket 4 is configured as a rectangular structure, and a avoidance step 41 corresponding to the avoidance groove 36 is provided on the non-conductive bracket 4. In this embodiment, the surface of the non-conductive bracket 4 is completely in contact with the bottom of the antenna mainboard 3, so that the antenna mainboard 3 is evenly stressed and the support for the antenna mainboard 3 is more stable.

[0029] Furthermore, the antenna mainboard 3 needs to be connected to the external structure by welding wires. Since the distance between the antenna mainboard 3 and the screen 1 is limited, the connecting wires can easily scratch the screen 1. Therefore, in this embodiment, a avoidance groove 36 is provided on the surface of the antenna body for the connecting wires to be installed by welding. The avoidance groove 36 is configured as a concave rectangular groove structure, and the concave height of the avoidance groove 36 is configured to be 0.5mm to 1mm.

[0030] Another embodiment of the utility model further provides a mobile terminal, including the antenna structure for a full metal back cover described in any of the above embodiments. Since the mobile terminal provided in this embodiment includes all the schemes of all the above embodiments of the antenna structure, it has at least the same technical effects as the antenna structure, which will not be elaborated here one by one.

[0031] The above description is only an optional embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An antenna structure for a full metal back cover, the antenna structure is installed between the screen and the metal back cover, characterized in that: The antenna structure includes an antenna mainboard, which is arranged in a rectangular plate structure, including a symmetrical first long side and a second long side, and a symmetrical first short side and a second short side; a resonant cavity is formed between the antenna mainboard and the metal back cover, and a non-conductive bracket for supporting the antenna mainboard is installed in the resonant cavity; an L-shaped bending portion is provided on the first long side, and the L-shaped bending portion is connected to the metal back cover; a avoidance groove for welding wires is provided on the surface of the antenna mainboard close to the first long side; a number of grounding foams connected to the screen are symmetrically provided on the surface of the antenna mainboard.

2. The antenna structure for a full metal back cover according to claim 1, characterized in that: The non-conductive bracket is configured as a PC integrally formed structure.

3. The antenna structure for a full metal back cover according to claim 2, characterized in that: The non-conductive support is configured as a rectangular structure, and a avoidance step corresponding to the avoidance groove is provided on the non-conductive support.

4. The antenna structure for a full metal back cover according to claim 3, characterized in that: The surface of the non-conductive bracket is completely in contact with the bottom of the antenna mainboard.

5. The antenna structure for a full metal back cover according to claim 1, characterized in that: The avoidance groove is configured as a concave rectangular groove structure, and the concave height of the avoidance groove is configured to be 0.5 mm to 1 mm.

6. The antenna structure for a full metal back cover according to claim 1, characterized in that: The two grounding foams are provided with two pieces, and the two grounding foams are symmetrically arranged on both sides of the avoiding groove along the length direction of the first long side.

7. The antenna structure for a full metal back cover according to claim 6, characterized in that: The distance between any of the grounding foams and the first long side is set to 4.32 mm to 9.32 mm, and the distance between any of the grounding foams and the first short side or the second short side closest to it is set to 7.17 mm to 12.17 mm.

8. The antenna structure for a full metal back cover according to claim 1, characterized in that: The length of the first long side or the second long side is set to 49.15 mm to 54.15 mm.

9. The antenna structure for a full metal back cover according to claim 8, characterized in that: The length of the first short side or the second short side is set to 21.3 mm to 26.3 mm.

10. A mobile terminal, characterized in that: The invention comprises the antenna structure for a metal back cover as described in any one of claims 1 to 9.

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