CN108206322B

CN108206322B - Terminal shell and terminal

Info

Publication number: CN108206322B
Application number: CN201611169027.9A
Authority: CN
Inventors: 王霖川
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2016-12-16
Filing date: 2016-12-16
Publication date: 2020-02-07
Anticipated expiration: 2036-12-16
Also published as: CN108206322A

Abstract

The utility model provides a terminal housing and terminal, belongs to terminal technical field. The terminal shell comprises an all-metal lower shell and a non-metal upper shell, and a first gap is formed between a first side frame of the non-metal upper shell and the all-metal lower shell; a vertical metal wire is arranged on the non-metal upper shell; a first bending line and a second bending line are arranged in an area formed by the metal vertical line and the first side frame, the first bending line comprises a step-shaped bending line and a first horizontal line, the first end of the step-shaped bending line is a feeding point, the first horizontal line is obtained by extending the second horizontal line where the second end of the step-shaped bending line is located to the direction of the first side frame, and the second bending line extends out of the opposite direction of the step-shaped bending line. The space occupied by the antenna is reduced by arranging the gap and using the metal frame as a part of the terminal antenna, and the purpose of designing the full-band LTE diversity antenna in a narrow space is achieved by adopting a wiring mode of a specific bent line.

Description

Terminal shell and terminal

Technical Field

The present disclosure relates to the field of terminal technologies, and in particular, to a terminal housing and a terminal.

Background

With the development of terminal technology and the change of aesthetic standards of users, it has become a popular trend to design the rear cover of the terminal as a metal rear cover.

In the related art, the communication antenna of the terminal is usually designed as an LTE (Long Term Evolution) diversity antenna. This LTE diversity antenna sets up in terminal inside headroom region usually, in order to prevent that the lid from leading to the fact the shielding to LTE diversity antenna behind the terminal for the terminal can not normally send and receive signals, designs into the syllogic with the terminal back lid usually, has the gap between two adjacent sections, makes LTE diversity antenna can carry out the receipt and the sending of signal through the gap of seting up.

However, as the terminal functions become more diversified and complicated, more and more components need to be mounted inside the terminal, so that a clearance area for designing an antenna inside the terminal becomes smaller and smaller. On the premise that the rear cover of the terminal is a metal rear cover, how to design the LTE diversity antenna by using a limited clearance area and ensure the performance of the LTE diversity antenna is the problem to be solved.

Disclosure of Invention

In order to overcome the problems in the related art, the present disclosure provides a terminal housing and a terminal, wherein the technical scheme is as follows:

according to a first aspect of embodiments of the present disclosure, there is provided a terminal housing comprising: the device comprises a full-metal lower shell and a non-metal upper shell, wherein a metal frame is surrounded on the outer edge of the non-metal upper shell;

the metal frame comprises a top frame, a first side frame and a second side frame, and a first gap is formed between the first side frame and the side edge of the full-metal lower shell;

a vertical metal wire is arranged on the nonmetal upper shell, a first end of the vertical metal wire is a grounding point, and a second end of the vertical metal wire is connected with the top frame;

a first bending line and a second bending line are arranged in an area formed by the metal vertical line and the first side frame,

wherein the first bending line comprises a step-shaped bending line and a first horizontal line, the first end of the step-shaped bending line close to the metal lower shell is a feeding point, the first horizontal line is obtained by extending a second horizontal line at the second end of the step-shaped bending line to the direction of the first side frame,

the second bending line is provided with a first horizontal part extending out from the opposite direction of the stepped bending line, a vertical part parallel to the first side frame and a second horizontal part bent towards the opposite direction of the first side frame, and the second horizontal part is parallel to the first horizontal line and partially overlapped in the vertical direction.

The gap is formed in the side frame of the terminal shell, the metal frame of the terminal shell is used as a part of the terminal antenna, the antenna is designed in a bent line wiring mode, the space occupied by the antenna is reduced, and the purpose of designing the antenna by using the limited clearance area of the terminal is achieved.

In a possible implementation manner, the second side frame and the all-metal lower shell are integrally formed. By adopting the integrated molding design, the manufacturing procedures can be reduced, and the manufacturing efficiency can be improved.

In a possible implementation manner, a second gap is formed between the second side frame and the side edge of the all-metal lower shell, and the second gap and the first gap are symmetrical along a central axis of the metal frame.

In a possible implementation manner, the feed point is connected with the rf front-end circuit inside the terminal housing through an elastic sheet. The function of the antenna is realized by connecting the feed point with the radio frequency front end part inside the terminal shell.

In a possible implementation manner, a portion between the grounding point and the upper edge of the first side frame forms a low-frequency antenna stub, and the low-frequency antenna stub is a parasitic antenna. By adopting the parasitic antenna, the low-frequency antenna can be realized by only designing one feed point and one grounding point on the terminal antenna, and the realization mode is simple.

In one possible implementation, the length of the low frequency antenna stub is between 80 mm and 100 mm. The length of the antenna branch is limited, so that the antenna branch can resonate in an antenna frequency band required to be designed.

In a possible implementation manner, the stepped bent line forms an intermediate frequency antenna stub, and the intermediate frequency antenna stub is a monopole antenna.

In a possible implementation manner, the length of the intermediate frequency antenna stub is less than one quarter of the intermediate frequency resonance wavelength.

In one possible implementation, the second meander line constitutes a high frequency antenna stub, and the high frequency antenna stub is a monopole antenna.

By adopting the monopole antenna, the contact points of the antenna branches and the internal circuit of the terminal shell can be reduced, the occupied space of the antenna is reduced, the firmness and durability of the antenna are improved, and parts for connection are saved, so that the cost is saved.

In one possible implementation, the length of the high-frequency antenna stub is less than one quarter of the high-frequency resonant wavelength.

In one possible implementation, the second horizontal portion is closer to the top bezel than the first horizontal line.

In one possible implementation, the width of the first gap is between 0.5 mm and 2 mm.

In one possible implementation, the width of the first slit is 0.8 mm.

The side frame of the terminal shell is provided with a gap with a proper width, so that the terminal antenna can normally receive and send signals.

In a possible implementation manner, the first end of the vertical metal wire is connected with the all-metal lower shell, or the first end of the vertical metal wire is connected with the grounding part inside the terminal shell through an elastic sheet, so that the flexibility of the grounding manner is improved.

According to a second aspect of the embodiments of the present disclosure, there is provided a terminal including the terminal housing provided in the first aspect and any one of the possible implementations of the first aspect.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the gap is formed in the side frame of the terminal shell, the metal frame of the terminal shell is used as a part of the terminal antenna, the space occupied by the antenna is reduced, the wiring mode of the specific bent line is adopted, the LTE diversity antenna with the full frequency band designed in the narrow space is achieved, and the purpose of ensuring the performance of the antenna is achieved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1A is a rear view of a terminal housing shown in accordance with an exemplary embodiment.

Fig. 1B is a rear view of a terminal housing shown in accordance with an exemplary embodiment.

Fig. 2 is a return loss plot of an LTE diversity antenna, shown in accordance with an example embodiment.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Fig. 1A is a rear view of a terminal housing according to an exemplary embodiment, and referring to fig. 1A, the terminal housing includes an all-metal lower housing 10 and a non-metal upper housing 11, the outer edge of which is surrounded by a metal bezel.

Wherein, the height H of the non-metal upper shell 11 is less than 10 mm. The non-metal upper housing 11 may be made of a non-metal material such as plastic or rubber, or may be made of a non-metal material with a higher hardness to avoid abrasion of the non-metal upper housing 11, which is not limited in the embodiment of the disclosure. In order to visually integrate the non-metal upper case 11 and the metal lower case 10, the outermost layer of the non-metal upper case 11 may be sprayed with an insulating paint having the same color as the metal lower case 10.

In order to design a terminal antenna by using a limited clearance area of a terminal and ensure the performance of the terminal antenna, the embodiment of the disclosure uses a metal frame as a part of the terminal antenna to realize the design of an LTE diversity antenna, and a structure of the LTE diversity antenna arranged on a terminal housing is introduced below.

As shown in fig. 1A, the metal bezel includes a top bezel 121, a first side bezel 122, and a second side bezel 123. In the rear view of the terminal housing shown in fig. 1A, only the first side frame 122 is taken as an example of a right frame of the metal frame, and the first side frame may also be a left frame of the metal frame, which is not limited in this disclosure.

In order to guarantee that the terminal antenna utilizing the metal frame design can normally receive and send signals, a gap is formed in the terminal shell, and the gap structure formed in the terminal shell is introduced as follows:

as shown in fig. 1A, the first side frame 122 and the side edge of the all-metal lower shell 10 have a first gap 13 therebetween, and the first gap 13 includes an upper edge 131 and a lower edge 132. The width of the first gap 13 is between 0.5 mm and 2 mm, for example, the width of the first gap 13 may be 0.8 mm. The lower edge of the first slit 13 may be flush with the upper line of the all-metal lower casing 10, or may be higher than the upper line of the all-metal lower casing 10 by a certain distance, for example, by 1 mm, and the like. Fig. 1A shows only the case where the lower edge of the first slit 13 is flush with the upper edge line of the all-metal lower case 10. The gap with suitable width is seted up through the frame with terminal housing for terminal antenna can be normal send-receive signal, and the gap can set up in a flexible way for the position of frame, has improved the flexibility and the variety of terminal housing design.

In an implementation manner, in order to make the appearance of the terminal housing more beautiful, a second gap 14 may also be provided between the second side frame 123 and the side edge of the all-metal lower housing 10, the second gap 14 and the first gap 13 may be symmetrical along the central axis of the metal frame, the widths of the second gap 14 and the first gap 13 may be the same, of course, the second gap 14 and the first gap 13 may also be asymmetrical, and the widths of the two may also be different, which is not limited in this disclosure.

In another implementation, the second side frame 123 may be integrally formed with the all-metal lower shell 10, that is, there may be no gap between the second side frame 123 and the all-metal lower shell 10.

It should be noted that fig. 1A only illustrates that a gap is formed between the second side frame 123 and the all-metal lower case 10, and the embodiment of the present disclosure does not limit whether a gap is formed between the second side frame 123 and the all-metal lower case 10.

The embodiment of the present disclosure utilizes the metal frame to be provided with the LTE diversity antenna on the nonmetal upper case 11, so as to implement the full-band LTE diversity antenna, and the structure of the LTE diversity antenna designed by the embodiment of the present disclosure is described in detail below:

the non-metal upper shell 11 is provided with a vertical metal wire 15, a first end of the vertical metal wire is a grounding point 151, and a second end of the vertical metal wire 15 is connected with the top frame 121. The first bending line 16 and the second bending line 17 are disposed in the region formed by the metal vertical line 15 and the first side frame 122, and the structures of these parts are described below:

vertical metal line 15: the first end of the vertical metal line 15 is a grounding point 151, and the second end of the vertical metal line 15 is connected to the top frame 121. The distance D between the connection point of the vertical metal line 15 and the top frame 121 and the connection point of the top frame and the first side frame 122 is 50% to 65% of the length of the top frame 121, for example, when the terminal has a screen size of 5 inches, the distance D may be 35 mm to 50 mm. By adopting the antenna design mode provided by the embodiment of the disclosure, the design of the antenna can be realized and the performance of the antenna can be ensured in the narrow design space on the nonmetal upper shell 11 indicated by the distance D.

The grounding point 151 may be grounded in the following two ways:

first, the ground point 151 can be directly connected to the all-metal lower case 10:

in the embodiment of the present disclosure, the all-metal lower case 10 is connected to a grounding portion inside the terminal case to implement a grounding design of the all-metal lower case, and thus, the grounding reliability of the grounding point 151 can be improved while saving materials by connecting the grounding point 151 to the all-metal lower case 10. In this manner, the vertical wires 15, the metal bezel, and the all-metal lower shell 10 are integrally molded.

In the second way, the grounding point 151 may be connected to the grounding portion inside the terminal housing through a spring plate:

this kind of mode can reduce the degree of difficulty of antenna design, improves the flexibility of the ground mode of ground point 151 simultaneously. In this manner, the ground point 151 and the all-metal lower case 10 do not contact.

It should be noted that, when the grounding point is designed at the leftmost end of the antenna structure, and another antenna is further disposed on the left side of the vertical metal line 15, the antenna designed according to the present disclosure can have good isolation from the other antenna. Fig. 1A illustrates only the first manner described above, which is not limited in the embodiment of the present disclosure.

First bend line 16: the first meander line 16 includes a step-shaped meander line 161 and a first horizontal line 162, the step-shaped horizontal line 161 is a feeding point 18 near the first end of the metal lower case 10, and the bending directions of the step-shaped meander line from the feeding point 18 are: up, left, up, left. The direction from the lower metal casing 10 to the top frame 121 is upward, and the direction from the first side frame 122 to the vertical metal line 15 is leftward. The first horizontal line 162 is formed by extending a second horizontal line, in which the second end of the stepped bending line 161 is located, toward the first side frame 122.

The feeding point 18 is connected to the rf front-end circuit inside the terminal housing through a spring.

Second bend line 17: the second bending line 17 has a first horizontal portion extending from the opposite direction of the stepped bending line 161, a vertical portion parallel to the first side frame 122, and a second horizontal portion bent in the opposite direction of the first side frame 122, the second horizontal portion being parallel to and partially overlapping the first horizontal portion 162. The second horizontal portion is closer to the top bezel 121 than the first horizontal line 162, i.e., the second horizontal portion is located above the first horizontal line 162.

In the above-described terminal housing structure, the portion between the ground point 151 and the upper edge of the first side frame 122 constitutes a low-frequency antenna stub, which is a parasitic antenna. The low frequency antenna stub has a length of between 80 mm and 100 mm. The stepped bent line 161 forms a branch of the if antenna, which is a monopole antenna. The length of the intermediate frequency antenna branch is less than one fourth of the intermediate frequency resonance wavelength. Wherein the second meander line 17 constitutes a high frequency antenna stub, which is a monopole antenna. The length of the high-frequency antenna branch is less than one fourth of the high-frequency resonance wavelength.

In practical designs, the resonant frequency of the low frequency antenna stub can be adjusted by changing the path length of the low frequency antenna stub. By increasing the path length of the low-frequency antenna stub, the resonant frequency of the low-frequency antenna stub can be shifted to a lower frequency. For example, moving the vertical wires 15 away from the first side frame 122 may be used to increase the path length of the low frequency antenna branches.

In practical designs, the resonant frequency of the if antenna stub can be adjusted by changing the path length of the if antenna stub. For example, the resonant frequency of the if antenna stub can be reduced by increasing the path length of the if antenna stub, such as extending the second end of the stepped meander line 16 in the direction of the metal vertical line 15, the if resonant frequency can be shifted to a lower frequency. It should be noted that the second end of the step bend line 16 is not in contact with the metal vertical line 15 during the extension process.

In practical designs, the resonant frequency of the high-frequency antenna stub can be adjusted by changing the path length of the high-frequency antenna stub. For example, the resonant frequency of the high frequency antenna stub can be increased by increasing the area of the stub end 16.

In practical design, the resonance bandwidths of the mid-frequency antenna stub and the high-frequency antenna stub may be adjusted by adjusting the range in which the second horizontal portion coincides with the first horizontal portion 162 in the vertical direction. For example, the resonance bandwidth of the if antenna stub or the hf antenna stub can be broadened by increasing the length of the overlap of the two parts, so that the terminal can operate in a wider frequency band range. The overlapping length may be increased by extending the first horizontal line in the direction of the first side frame, or the overlapping length may be increased by extending the second horizontal line in the direction of the metal vertical line. Meanwhile, by increasing the overlapping length of the second horizontal portion and the first horizontal line 162, the resonant frequency of the intermediate frequency antenna stub can be shifted to a lower frequency.

In addition, the resonant frequency or the resonant bandwidth of each antenna branch can be adjusted by adjusting the width and the pitch of the wires of each antenna path. Of course, the trace pitch should be greater than a preset threshold, and the preset threshold may be determined according to actual conditions, such as design requirements of the antenna, antenna materials, and the like. For example, the preset threshold may be 0.5 mm.

It should be noted that the whole terminal housing may be designed by an integrated molding process, for example, the terminal housing may be cut from an all-metal housing, for example, edges of the non-metal upper housing 11, the metal frame, the first slit 13, the vertical metal wire 15, the branch end 16, the first branch 17, and the second branch 18 are marked on the all-metal housing, and then cut by a uniform cutting method to form the terminal housing shown in fig. 1A. Of course, in order to make the terminal housing more beautiful, the lower end of the terminal housing, which is symmetrical to the non-metallic upper housing 11, may be designed as a non-metallic lower housing 21, as shown in fig. 1B.

Fig. 2 shows a return loss diagram of an LTE diversity antenna in an embodiment of the present disclosure. As shown in fig. 2, the return loss of the low frequency band between the reference number 1 and the reference number 2 is substantially less than-5 dB, which satisfies the design requirement of the antenna. The dial-back loss of the intermediate frequency band between the label 4 and the label 5 is basically less than-5 dB, and the design requirement of the antenna is met. The return loss of the high-frequency band between the label 8 and the label 9 is basically less than-5 dB, and the design requirement of the antenna is met.

In the embodiment of the disclosure, a gap is formed in the side frame of the terminal shell, the metal frame of the terminal shell is used as a part of the terminal antenna, the space occupied by the antenna is reduced, and the purpose of designing the full-band LTE diversity antenna in a narrow space and ensuring the performance of the antenna is achieved by adopting the wiring mode of the specific bent line. In addition, active devices such as a switch and a variable capacitor are not introduced into the designed antenna, and the implementation mode is simple. Furthermore, the whole antenna design only has one grounding point and one feeding point, contact points for connecting the antenna and the inside of the terminal shell are reduced, the firmness and the durability of the terminal antenna are improved, parts for connection are saved, and the cost is saved.

The embodiment of the present disclosure further provides a terminal, where the terminal includes the terminal housing related to the above embodiment, and includes all structures and functions of the terminal housing, which are not described herein again. Of course, the terminal further comprises a terminal front shell, a terminal display screen and other electronic components in the terminal, the plurality of antenna units included by the terminal shell are matched with the other electronic components in the terminal to work, so that the communication function of the terminal is realized, and the detailed composition of the terminal is not limited by the disclosure.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A terminal housing, comprising: the device comprises a full-metal lower shell and a non-metal upper shell, wherein a metal frame is surrounded on the outer edge of the non-metal upper shell;

wherein, first meander line includes stairstepping meander line and first water flat line, stairstepping meander line is close to the first end of casing is the feed point under the metal, stairstepping meander line by the direction of buckling that the feed point is the starting point does in proper order: upwards, leftwards, upwards and leftwards, wherein the first horizontal line is obtained by extending a second horizontal line in which the second end of the stepped bending line is positioned to the direction of the first side frame, the first horizontal line is obtained by starting from the right end of the second horizontal line in which the second end of the stepped bending line is positioned and extending to the direction of the first side frame,

the second bending line has a first horizontal portion extending from the opposite direction of the stepped bending line, a vertical portion parallel to the first side frame, and a second horizontal portion bent toward the opposite direction of the first side frame, the second horizontal portion being parallel to the first horizontal line and partially overlapping in the vertical direction, wherein the first horizontal portion is connected to the vicinity of the first end of the stepped bending line.

2. The terminal housing of claim 1, wherein the second side frame is integrally formed with the all-metal lower housing.

3. A terminal housing according to claim 1, wherein said second side bezel has a second gap with a side edge of said all-metal lower housing, said second gap being symmetrical to said first gap along a central axis of said metal bezel.

4. The terminal housing according to claim 1, wherein the feed point is connected to a radio frequency front end circuit inside the terminal housing through a spring.

5. A terminal housing according to claim 1, wherein the portion of the ground point to the upper edge of the first side frame constitutes a low frequency antenna stub, the low frequency antenna stub being a parasitic antenna.

6. A terminal housing according to claim 5, characterised in that the length of the low frequency antenna stub is between 80 and 100 millimetres.

7. A terminal housing according to claim 1, wherein the stepped meander line constitutes an intermediate frequency antenna stub, which is a monopole antenna.

8. A terminal housing according to claim 7, wherein the length of the IF antenna stub is less than one quarter of the IF resonant wavelength.

9. A terminal housing according to claim 1, wherein the second meander line constitutes a high frequency antenna stub, the high frequency antenna stub being a monopole antenna.

10. A terminal housing according to claim 9, characterised in that the length of the high-frequency antenna stub is less than a quarter of the high-frequency resonance wavelength.

11. A terminal housing according to claim 1, wherein the second horizontal portion is closer to the top bezel than the first horizontal line.

12. A terminal housing according to claim 1, wherein the width of the first slot is between 0.5 mm and 2 mm.

13. A terminal housing according to claim 12, wherein the width of the first slot is 0.8 mm.

14. The terminal housing of claim 1, wherein the first end of the vertical wire is connected to the all-metal lower housing, or the first end of the vertical wire is connected to a ground portion inside the terminal housing through a spring.

15. A terminal, characterized in that it comprises a terminal housing according to any of claims 1 to 14.