EP4664681A1

EP4664681A1 - Terminal device

Info

Publication number: EP4664681A1
Application number: EP24806149.1A
Authority: EP
Inventors: Xiaoyong Dong; Chaoliang YANG; Kangle XUE
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2023-05-18
Filing date: 2024-03-07
Publication date: 2025-12-17
Also published as: CN119009464A; CN121219913A; CN119009464B; WO2024234788A1

Abstract

This application provides a terminal device. The terminal device includes a middle frame antenna and a conductive spring plate. The conductive spring plate is mounted on an inner side of the middle frame antenna, the conductive spring plate includes a feeding portion, a fixing portion, and a grounding portion, the fixing portion is fixedly connected to the middle frame antenna, both the feeding portion and the grounding portion are fixedly connected to the fixing portion, the feeding portion is configured to feed the middle frame antenna, and the grounding portion is configured to ground the middle frame antenna. According to the terminal device provided in this application, the middle frame antenna can be fed and grounded in a small space in the terminal device, which has a wide application prospect.

Description

This application claims priority to Chinese Patent Application No. 202310566098.6, filed with the China National Intellectual Property Administration on May 18, 2023 and entitled "TERMINAL DEVICE", which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

This application relates to the field of electronic device technologies, and in particular, to a terminal device.

BACKGROUND

An antenna is usually disposed in a terminal device, and the antenna needs to be fed and grounded, to ensure normal communication of the terminal device. Currently, in a terminal device, electronic components such as a mainboard occupy a large space in the terminal device. How to feed and ground an antenna in a small space becomes a problem to be urgently resolved.

SUMMARY

An objective of embodiments of this application is to provide a terminal device. An antenna can be fed and grounded in a small space in the terminal device, which has a wide application prospect.
The embodiments of this application provide a terminal device, where the terminal device includes a middle frame antenna and a conductive spring plate, the conductive spring plate is mounted on an inner side of the middle frame antenna, the conductive spring plate includes a feeding portion, a fixing portion, and a grounding portion, the fixing portion is fixedly connected to the middle frame antenna, both the feeding portion and the grounding portion are fixedly connected to the fixing portion, the feeding portion is configured to feed the middle frame antenna, and the grounding portion is configured to ground the middle frame antenna.
In a solution in which a feeding conductive spring plate configured for feeding and a grounding conductive spring plate configured for grounding are separately welded to the middle frame antenna to implement an electrical connection, because a spot welding space is needed when the feeding conductive spring plate and the grounding conductive spring plate are welded to the middle frame antenna, a large amount of space in the terminal device is to be occupied. In the terminal device provided in the embodiments of this application, the feeding portion and the grounding portion are simultaneously disposed on the conductive spring plate, so that the feeding portion and the grounding portion are connected to one conductive spring plate. In this way, an original spot welding region needed by the feeding conductive spring plate configured for feeding and an original spot welding region needed by the grounding conductive spring plate configured for grounding are combined, thereby reducing a space needed in spot welding of the conductive spring plate, thereby reducing a space occupied by the conductive spring plate in the terminal device. Further, the middle frame antenna can be fed and grounded in a small space of the terminal device, which has a wide application prospect.
In addition, it is considered that local unevenness may occur when the feeding conductive spring plate and the grounding conductive spring plate are separately spot-welded to the middle frame antenna, and a specific space is needed for each of the feeding conductive spring plate and the grounding conductive spring plate to ensure contact with an antenna spring contact. Therefore, a specific spacing distance needs to be reserved between the feeding conductive spring plate and the grounding conductive spring plate. In the terminal device in the embodiments of this application, because there is no need to separately use the feeding conductive spring plate and the grounding conductive spring plate, the spacing distance that needs to be reserved between the feeding conductive spring plate and the grounding conductive spring plate is canceled, further reducing an occupied space, additionally resolving a problem that because a length of the feeding conductive spring plate, a length of the grounding conductive spring plate, and the spacing distance between the feeding conductive spring plate and the grounding conductive spring plate are considered, a length required in the solution of separately using the feeding conductive spring plate and the grounding conductive spring plate is longer than a length of the middle frame antenna electrically connected to the feeding conductive spring plate and the grounding conductive spring plate, a large space needs to be occupied, and it is difficult to use in a small space.
In addition, compared with a solution in which a single feeding conductive spring plate or a single grounding conductive spring plate is used, an area of the conductive spring plate used in the terminal device provided in the embodiments of this application is large, facilitating subsequent limitation and fixing of the conductive spring plate. In addition, an area of the fixing portion used as a central spot welding region in the conductive spring plate is also large, facilitating improvement of welding strength between the fixing portion and the middle frame antenna, thereby facilitating improvement of connection strength between the conductive spring plate and the middle frame antenna.
In a possible implementation, the feeding portion and the grounding portion are connected to the fixing portion on two opposite sides.
In a possible implementation, the terminal device further includes a first circuit board, a first antenna spring contact, and a second antenna spring contact, the first antenna spring contact is electrically connected between the first circuit board and the feeding portion of the conductive spring plate, and the second antenna spring contact is electrically connected between the first circuit board and the grounding portion of the conductive spring plate. The conductive spring plate is disposed between the middle frame antenna and the first antenna spring contact and the second antenna spring contact. In this way, a problem that a current corresponding to the middle frame antenna during operation is nonlinear due to direct contact between the middle frame antenna and the first antenna spring contact and the second antenna spring contact, and a frequency multiplication harmonic is generated, thereby interfering with an RSE (Radiated Spurious Emission, radiated spurious emission) of another antenna can be avoided.
In a possible implementation, the terminal device further includes a circuit board assembly, the first circuit board is electrically connected to the circuit board assembly, both the first antenna spring contact and the second antenna spring contact are mounted on the circuit board assembly and are disposed at an interval from each other, the first antenna spring contact is electrically connected between the circuit board assembly and the feeding portion of the conductive spring plate, and the second antenna spring contact is electrically connected between the circuit board assembly and the grounding portion of the conductive spring plate.
In a possible implementation, the circuit board assembly includes a second circuit board and an electrical connector, both the first antenna spring contact and the second antenna spring contact are mounted on the second circuit board and are electrically connected to the second circuit board, and the electrical connector is electrically connected between the second circuit board and the first circuit board. When the middle frame antenna is distant from the first circuit board, it is difficult to electrically connect the first circuit board to the middle frame antenna by using only the first antenna spring contact and the second antenna spring contact, so that the middle frame antenna cannot be fed by using the first circuit board. In the terminal device in the embodiments of this application, the first antenna spring contact and the second antenna spring contact are fixed and electrically connected by using the second circuit board in the circuit board assembly, to implement an electrical connection between the circuit board assembly and the middle frame antenna. In addition, the second circuit board is electrically connected to the first circuit board by using the electrical connector in the circuit board assembly, and a feature of flexible routing of the electrical connector is used, to implement an electrical connection between the distant first circuit board and the middle frame antenna by using the circuit board assembly, so that a problem that it is difficult to feed the middle frame antenna by using the first circuit board because the middle frame antenna is distant from the first circuit board can be resolved, and a space in the terminal device can be effectively used. In addition, the first antenna spring contact and the second antenna spring contact are fixed by using the second circuit board, which can improve mounting stability of the first antenna spring contact and the second antenna spring contact, and prevent the first antenna spring contact and the second antenna spring contact from moving when being flexibly in contact with the conductive spring plate.
In a possible implementation, the second circuit board includes a first part and a second part, the first part and the conductive spring plate are disposed opposite to and at an interval from each other, both the first antenna spring contact and the second antenna spring contact are mounted on a surface of the first part facing the conductive spring plate, the second part is fixedly connected to the first part, and the electrical connector is electrically connected between the second part and the first circuit board.
In a possible implementation, the first circuit board and the second part are disposed opposite to and at an interval from each other, the terminal device further includes a speaker module, the speaker module is located between the first circuit board and the second part, and the electrical connector is electrically connected to the second part and extends along an edge of the speaker module to be electrically connected to the first circuit board.
In a possible implementation, both the feeding portion and the grounding portion are connected to the fixing portion on a same side, and are disposed at an interval from each other. Compared with a manner in which the feeding portion and the grounding portion in the conductive spring plate are located on two opposite sides of the fixing portion, in this manner, because the feeding portion and the grounding portion in the conductive spring plate are located on the same side of the fixing portion, in a case that a length of the fixing portion is fixed, a length of the conductive spring plate is shorter, and space occupation of the conductive spring plate in a length direction can be reduced, thereby facilitating feeding and grounding the middle frame antenna in a small space. In a case that an occupied space of the conductive spring plate in the length direction is fixed, which is equivalent to that an extension length of the fixing portion is increased, a welding area of the conductive spring plate and the middle frame antenna can be increased, thereby improving connection stability between the conductive spring plate and the middle frame antenna.
In a possible implementation, the feeding portion and the fixing portion are connected at an angle, and the grounding portion and the fixing portion are connected at an angle, so that the fixing portion, the feeding portion, and the grounding portion that are in the conductive spring plate are not located on a same plane, facilitating application of the conductive spring plate to a plurality of mounting scenarios.
In a possible implementation, an angle between a plane on which the feeding portion is located and a plane on which the fixing portion is located is θ1, θ1 is an obtuse angle, an angle between a plane on which the grounding portion is located and the plane on which the fixing portion is located is θ2, and θ2 is an obtuse angle.
In a possible implementation, θ1 is equal to θ2.
In a possible implementation, the conductive spring plate further includes a connecting portion, the connecting portion, the feeding portion, and the grounding portion are located on the same side of the fixing portion, and the connecting portion is fixedly connected to the fixing portion and is connected between the feeding portion and the grounding portion. The connecting portion is disposed between the feeding portion and the grounding portion, and the connecting portion is connected to the fixing portion, so that connection strength among the feeding portion, the grounding portion, and the fixing portion can be enhanced, to avoid disconnection of the feeding portion or the grounding portion from the fixing portion. In addition, a current flowing from the feeding portion may also flow into the fixing portion along the connecting portion, and flow into the middle frame antenna through the fixing portion, to feed the middle frame antenna. In this case, the added connecting portion may also be used as an antenna radiator, and performance of the antenna radiator can be further improved, thereby facilitating improvement of antenna signal quality of the terminal device.
In a possible implementation, the terminal device further includes a first circuit board, a first antenna spring contact, and a second antenna spring contact, both the first antenna spring contact and the second antenna spring contact are mounted on the first circuit board and are disposed at an interval from each other, the first antenna spring contact is electrically connected between the first circuit board and the feeding portion of the conductive spring plate, and the second antenna spring contact is electrically connected between the first circuit board and the grounding portion of the conductive spring plate.
In a possible implementation, the feeding portion and the first circuit board are located on a same side of the first antenna spring contact, and the grounding portion and the first circuit board are located on a same side of the second antenna spring contact. A connection manner is simple, and an occupied space is small.
In a possible implementation, the terminal device includes a first housing, a second housing, and a rotating shaft, the rotating shaft is connected between the first housing and the second housing, and the first housing includes the middle frame antenna.
In a possible implementation, the terminal device includes a rear cover and a middle frame, and the middle frame is disposed on a periphery of the rear cover and includes the middle frame antenna.
In a possible implementation, the feeding portion, the fixing portion, and the grounding portion are integrally formed.

BRIEF DESCRIPTION OF DRAWINGS

To describe technical solutions in embodiments of this application or the prior art more clearly, the following briefly describes accompanying drawings required for describing the embodiments or the prior art. Apparently, the accompanying drawings in the following descriptions show merely some embodiments of this application, and a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts.

FIG. 1 is a schematic diagram of a structure of a terminal device according to Embodiment 1 of this application;
FIG. 2 is a schematic diagram of a partial structure of a first housing in the terminal device shown in FIG. 1;
FIG. 3 is a schematic structural diagram of the partial structure shown in FIG. 2 from another perspective;
FIG. 4 is a schematic diagram of a partial assembly structure of a conductive spring plate, a circuit board assembly, a first antenna spring contact, and a second antenna spring contact that are in the partial structure shown in FIG. 2;
FIG. 5 is a schematic diagram of a structure of the conductive spring plate in the partial structure shown in FIG. 2;
FIG. 6 is a schematic diagram of a partial structure of the partial structure shown in FIG. 2;
FIG. 7 is a partial enlarged view of Part A in the partial structure shown in FIG. 6;
FIG. 8 is a schematic diagram of a partial structure of a terminal device according to Comparative Example 1;
FIG. 9 is a schematic curve diagram of a return loss and radiation efficiency of a middle frame antenna in the terminal device according to Embodiment 1 and a middle frame antenna in the terminal device according to Comparative Example 1;
FIG. 10 is a schematic diagram of a partial structure of a terminal device according to Embodiment 2 of this application;
FIG. 11 is a schematic diagram of a structure of a conductive spring plate in the partial structure shown in FIG. 10; and
FIG. 12 is a schematic diagram of a structure after an insulating part is removed from the partial structure shown in FIG. 10.

DESCRIPTION OF EMBODIMENTS

The following clearly and completely describes the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are merely some rather than all embodiments of this application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of this application without creative efforts shall fall within the protection scope of this application.
Refer to FIG. 1. FIG. 1 is a schematic diagram of a structure of a terminal device 1 according to Embodiment 1 of this application.
An embodiment of this application provides a terminal device 1, and the terminal device 1 includes, but is not limited to a device, such as a mobile phone, a tablet computer, or a wearable device, that is equipped with an antenna assembly. The wearable device may be a smart bracelet, a smart watch, a pair of augmented reality (augmented reality, AR) glasses, a pair of virtual reality (virtual reality, VR) glasses, or the like. In this embodiment, the terminal device 1 is a foldable mobile phone, namely, a mobile phone that can be switched between a folded state and an unfolded state.
It should be understood that the terminal device 1 shown in this embodiment of this application is an electronic product that can be folded once. In another embodiment, the terminal device 1 may alternatively be an electronic product that can be folded for a plurality of times (twice or more). In this case, the terminal device 1 includes a plurality of parts. Two adjacent parts may be folded relatively close to each other until the electronic device 1 is in the folded state, and the two adjacent parts may alternatively be unfolded relatively far away from each other until the terminal device 1 is in the unfolded state.
The terminal device 1 includes a housing assembly 1000, a plurality of electronic components (not shown in FIG. 1), and a display screen (not shown in FIG. 1). An accommodating chamber is provided in the housing assembly 1000, and all the plurality of electronic components are accommodated in the accommodating chamber. Exemplarily, the plurality of electronic components include, but are not limited to a mainboard, a speaker module, and the like. The display screen is mounted on the housing assembly 1000.
In this embodiment, the accommodating chamber includes a first chamber and a second chamber. The housing assembly 1000 includes a first housing 100, a second housing 200, and a rotating shaft 300. The rotating shaft 300 is connected between the first housing 100 and the second housing 200, to implement a rotatable connection between the first housing 100 and the second housing 200. Specifically, both the first housing 100 and the second housing 200 include a rear cover 110 and a middle frame 120. A middle frame 120 of the first housing 100 is disposed on a periphery of a rear cover 110 of the first housing 100, and encloses the first chamber together with the rear cover 110 of the first housing 100. The second housing 200 includes a rear cover 110 and a middle frame 120. The middle frame 120 is disposed on a periphery of the rear cover 110, and encloses the second chamber together with the rear cover 110 to form. The rotating shaft 300 is rotatably connected between the middle frame 120 of the first housing 100 and the middle frame 120 of the second housing 200, is located on a side of the rear cover 110 of the first housing 100 facing the middle frame 120, and is located on a side of the rear cover 110 of the second housing 200 facing the middle frame 120. The rear cover 110 of the first housing 100 may be rotated around the rotating shaft 300 and relative to the rear cover 110 of the second housing 200, and the middle frame 120 of the first housing 100 may be rotated around the rotating shaft 300 and relative to the middle frame 120 of the second housing 200, so that the first housing 100 is folded around the rotating shaft 300 and relative to the second housing 200.
The display screen is mounted on the first housing 100 and the second housing 200, and may be folded around the rotating shaft 300. In this embodiment, the display screen is a flexible screen. The display screen includes a first part, a bendable part, and a second part. The first part is mounted on the middle frame 120 of the first housing 100, and is disposed opposite to the rear cover 110 of the first housing 100. The bendable part is disposed opposite to the rotating shaft 300. The second part is mounted on the middle frame 120 of the second housing 200, and is disposed opposite to the rear cover 110 of the second housing 200. In this embodiment, the first part, the bendable part, and the second part are integrally formed. In another embodiment, the first part, the bendable part, and the second part may alternatively be separate parts. This is not limited in this application.
The first housing 100 and the second housing 200 may be rotated relative to each other by using the rotating shaft 300, so that the terminal device 1 is switched between the unfolded state and the folded state. Specifically, the first housing 100 and the second housing 200 may be rotated relative to each other to be disposed opposite to each other, to cause the terminal device 1 to be in the unfolded state. In this case, an angle between the rear cover 110 of the first housing 100 and the rear cover 110 of the second housing 200 is approximately 180 degrees. An angle between the middle frame 120 of the first housing 100 and the middle frame 120 of the second housing 200 is approximately 180 degrees. The first part and the second part of the display screen are unfolded in opposite directions, and the bendable part is flattened without bending.
The first housing 100 and the second housing 200 may be rotated relative to each other to be disposed opposite to each other, to cause the terminal device 1 to be in the folded state. In this case, the rear cover 110 of the first housing 100 and the rear cover 110 of the second housing 200 are disposed opposite to each other. The middle frame 120 of the first housing 100 and the middle frame 120 of the second housing 200 are disposed opposite to each other. The first part and the second part of the display screen are disposed opposite to each other, and the bendable part is bent.
It is to be noted that, in some other embodiments, the terminal device 1 may alternatively not be a foldable mobile phone. For example, the terminal device 1 may be a bar phone. In this case, the terminal device 1 includes a rear cover, a middle frame, and a display screen. The middle frame is disposed on a periphery of the rear cover and includes a middle frame antenna. The display screen is mounted on the middle frame and is disposed opposite to the rear cover. For a structure of the middle frame and a design for feeding the middle frame antenna and the middle frame antenna, reference may be made to relative designs of a middle frame 120 and a middle frame antenna 430 below. This is not described in detail again below.
Refer to FIG. 2 and FIG. 3. FIG. 2 is a schematic diagram of a partial structure of the first housing 100 in the terminal device 1 shown in FIG. 1, and FIG. 3 is a schematic structural diagram of the partial structure shown in FIG. 2 from another perspective. A dotted-line box in FIG. 2 represents a mounting location of the rotating shaft 300.
In this embodiment, a structure of the middle frame 120 of the first housing 100 is similar to a structure of the middle frame 120 of the second housing 200. The following uses the middle frame 120 of the first housing 100 as an example for description.
An antenna gap 410 and a sound cavity hole 420 are provided on the middle frame 120. An opening of the antenna gap 410 is provided on the middle frame 120, and runs through the middle frame 120 in a thickness direction of the terminal device 1, to separate the middle frame 120 to form a plurality of middle frame antennas 430. In this embodiment, a material of the middle frame 120 is a metal material, such as aluminum alloy or magnesium alloy. The middle frame antenna 430 is configured to ensure normal communication of the terminal device 1. There are a plurality of sound cavity holes 420. The plurality of sound cavity holes 420 are all provided on the middle frame 120, are provided at intervals from each other, and are provided at an interval from the antenna gap 410. Exemplarily, there are four sound cavity holes 420. In another embodiment, a quantity of sound cavity holes 420 may alternatively be one, two, five, or the like. The quantity of sound cavity holes 420 is not specifically limited in the embodiments of this application. In this embodiment, each sound cavity hole 420 runs through the middle frame 120 in a width direction of the terminal device 1, and is in communication with the accommodating chamber. In another embodiment, the sound cavity hole 420 may alternatively run through the middle frame 120 in a length direction of the terminal device 1.
The middle frame 120 further includes an insulating part 440. The insulating part 440 fills the antenna gap 410, and is fixedly connected between two adjacent middle frame antennas 430.
With reference to specific structures, the following describes a design for feeding the middle frame antenna 430 and grounding the middle frame antenna 430.
The terminal device 1 further includes a first circuit board 510, a battery 520, a speaker module 530, a conductive spring plate 600, a circuit board assembly 700, a first antenna spring contact 810, and a second antenna spring contact 820. The first circuit board 510, the battery 520, the speaker module 530, the conductive spring plate 600, the circuit board assembly 700, the first antenna spring contact 810, and the second antenna spring contact 820 are all mounted in the first chamber in the accommodating chamber. In this embodiment, the first circuit board 510 may be a mainboard of the terminal device 1.
The first circuit board 510 and the rotating shaft 300 are disposed opposite to each other and are disposed at an interval from each other. The battery 520 is mounted between the first circuit board 510 and the rotating shaft 300, and is disposed opposite to and at an interval from the middle frame antenna 430. The first circuit board 510, the battery 520, the rotating shaft 300, and the middle frame antenna 430 enclose an accommodating space. The speaker module 530 is mounted in the accommodating space, and is disposed opposite to the sound cavity holes 420. The speaker module 530 may produce sound, and the sound may be diffused into an external environment through the sound cavity holes 420, to implement sound production of the terminal device 1. The conductive spring plate 600 is mounted on an inner side of the middle frame antenna 430, and is electrically connected to the middle frame antenna 430. Both the first antenna spring contact 810 and the second antenna spring contact 820 are electrically connected between the conductive spring plate 600 and the circuit board assembly 700. The circuit board assembly 700 is electrically connected to the battery 520.
Because mounting of the first circuit board 510, the battery 520, the speaker module 530, and the rotating shaft 300 occupies a large amount of space in the terminal device 1, the middle frame antenna 430 located on a side of the antenna gap 410 away from the first circuit board 510 needs to achieve an effect of being fed and grounded in a small space. In view of this, in this embodiment of this application, the conductive spring plate 600 is mounted on the middle frame antenna 430, and the feeding portion and the grounding portion are concentrated on one conductive spring plate 600. The conductive spring plate 600 occupies a small space, so that the middle frame antenna 430 can be fed and grounded in a small space.
Refer to FIG. 2 and FIG. 4. FIG. 4 is a schematic diagram of a partial assembly structure of the conductive spring plate 600, the circuit board assembly 700, the first antenna spring contact 810, and the second antenna spring contact 820 that are in the partial structure shown in FIG. 2.
A signal feed point and a ground feed point are disposed on the first circuit board 510, and are respectively configured for feeding the middle frame antenna 430 and grounding the middle frame antenna 430 by using the first circuit board 510.
The circuit board assembly 700 includes a second circuit board 710 and an electrical connector 720. The electrical connector 720 is electrically connected to the second circuit board 710. Exemplarily, the second circuit board 710 is a flexible printed circuit (Flexible Printed Circuit, FPC), and the electrical connector 720 is a cable.
Specifically, the second circuit board 710 includes a first part 711 and a second part 712. The second part 712 is fixedly connected to the first part 711, and an angle between the second part 712 and the first part 711 is greater than 0. In this embodiment, the first part 711 is approximately in a planar board shape. The second part 712 is fixedly connected to the first part 711, and extends in a thickness direction of the first part 711 and in a direction away from a surface of the first part 711. In this embodiment, a plane on which the second part 712 is located is approximately perpendicular to a plane on which the first part 711 is located. The electrical connector 720 is electrically connected to the second part 712, to implement an electrical connection between the electrical connector 720 and the second circuit board 710.
The first antenna spring contact 810 is configured to feed the middle frame antenna 430, and the second antenna spring contact 820 is configured to ground the middle frame antenna 430. In this embodiment, there is one first antenna spring contact 810, and there is one second antenna spring contact 820. Exemplarily, both the first antenna spring contact 810 and the second antenna spring contact 820 are common antenna spring contacts. A structure of the first antenna spring contact 810 and a structure of the second antenna spring contact 820 are not limited in this application, and a structure that can be flexibly in contact with and be electrically connected to the conductive spring plate 600 can be used.
Refer to FIG. 5 and FIG. 6. FIG. 5 is a schematic diagram of a structure of the conductive spring plate 600 in the partial structure shown in FIG. 2, and FIG. 6 is a schematic diagram of a local structure of the partial structure shown in FIG. 2. Dotted lines in FIG. 5 and FIG. 6 merely represent region division of each part of the conductive spring plate 600, and do not represent actual structures. In FIG. 6, the insulating part 440 is removed.
The conductive spring plate 600 includes a feeding portion 610a, a grounding portion 620a, and a fixing portion 630a. Both the feeding portion 610a and the grounding portion 620a are fixedly connected to the fixing portion 630a. In this embodiment, the feeding portion 610a, the grounding portion 620a, and the fixing portion 630a are integrally formed. The feeding portion 610a is configured to feed the middle frame antenna 430, and the grounding portion 620a is configured to ground the middle frame antenna 430.
Specifically, in an extending direction of the conductive spring plate 600, the feeding portion 610a and the grounding portion 620a are connected to the fixing portion 630a on two opposite sides. In this embodiment, the feeding portion 610a, the grounding portion 620a, and the fixing portion 630a are located on a same plane. Exemplarily, the conductive spring plate 600 is in an elongated slice shape. The fixing portion 630a may be fixedly connected, through welding, to a surface of the middle frame antenna 430 facing the accommodating chamber, so that the conductive spring plate 600 is fixedly connected to the inner side of the middle frame antenna 430.
Still refer to FIG. 2 and FIG. 4. In the assembled terminal device 1, the fixing portion 630a in the conductive spring plate 600 is fixedly connected to the inner side of the middle frame antenna 430, to implement an electrical connection between the conductive spring plate 600 and the middle frame antenna 430. The first part 711 in the second circuit board 710 is disposed opposite to and at an interval from the conductive spring plate 600, and the second part 712 is located on a side of the speaker module 530 away from the first circuit board 510, so that the speaker module 530 is located between the first circuit board 510 and the second part 712. Both the first antenna spring contact 810 and the second antenna spring contact 820 are fixedly connected to a surface of the first part 711 facing the conductive spring plate 600, and are electrically connected to the first part 711, to implement an electrical connection between the first antenna spring contact 810 and the circuit board assembly 700 and an electrical connection between the second antenna spring contact 820 and the circuit board assembly 700. The first antenna spring contact 810 and the second antenna spring contact 820 are disposed at an interval from each other, and both are electrically connected to the conductive spring plate 600. The first antenna spring contact 810 is flexibly in contact with the feeding portion 610a of the conductive spring plate 600, and is electrically connected to the feeding portion 610a. The second antenna spring contact 820 is flexibly in contact with the grounding portion 620a of the conductive spring plate 600, and is electrically connected to the grounding portion 620a. The electrical connector 720 is electrically connected to the second part 712, and extends along an edge of the speaker module 530 to be electrically connected to the first circuit board 510, so that the electrical connector 720 is electrically connected between the second part 712 and the first circuit board 510, thereby implementing an electrical connection between the circuit board assembly 700 and the first circuit board 510.
Refer to FIG. 7. FIG. 7 is a partial enlarged view of Part A in the partial structure shown in FIG. 6. An arrow direction in FIG. 7 represents merely a schematic flowing path of a current.
The first circuit board 510 may direct the current to the feeding portion 610a of the conductive spring plate 600 sequentially through the signal feed point, the electrical connector 720, the second part 712 of the second circuit board 710, the first part 711 of the second circuit board 710, and the first antenna spring contact 810 flexibly in contact with the feeding portion 610a of the conductive spring plate 600. The current flowing into the feeding portion 610a flows into the fixing portion 630a, and flows, through the fixing portion 630a, into the middle frame antenna 430 welded to the fixing portion 630a, to feed the middle frame antenna 430. In this case, other than the middle frame antenna 430 being used as an antenna radiator, the conductive spring plate 600 fixedly connected to the middle frame antenna 430 may be used as the antenna radiator, which is equivalent to that the antenna radiator becomes thicker, improving antenna signal quality of the terminal device 1.
Both the current flowing into the fixing portion 630a in the conductive spring plate 600 and the current flowing into the middle frame antenna 430 may flow into the grounding portion 620a, and are connected to the ground feed point of the first circuit board 510 sequentially through the second antenna spring contact 820 flexibly in contact with the grounding portion 620a, the first part 711 of the second circuit board 710, the second part 712 of the second circuit board 710, and the electrical connector 720, to ground the middle frame antenna 430.
In a solution in which a feeding conductive spring plate for feeding and a grounding conductive spring plate for grounding are welded to the middle frame antenna 430 to implement an electrical connection, because a spot welding space is needed when the feeding conductive spring plate and the grounding conductive spring plate are welded to the middle frame antenna 430, a large amount of the space in the terminal device 1 needs to be occupied. In an aspect, in the terminal device 1 provided in the embodiments of this application, the feeding portion 610a and the grounding portion 620a are simultaneously disposed on the conductive spring plate 600, so that the feeding portion and the grounding portion are connected to one conductive spring plate 600, thereby combining an original spot welding region needed by the feeding conductive spring plate configured for feeding and an original spot welding region needed by the grounding conductive spring plate configured for grounding, reducing a space needed in spot welding of the conductive spring plate 600, thereby reducing a space occupied by the conductive spring plate 600 in the terminal device 1. In addition, a length of the fixing portion 630a of the conductive spring plate 600 is less than a sum of a length of a fixing portion of the feeding conductive spring plate and a length of a fixing portion of the grounding conductive spring plate, which is equivalent to that the length of the fixing portion 630a is reduced, thereby reducing a length of the conductive spring plate 600, and reducing the space occupied by the conductive spring plate 600 in the terminal device 1. In addition, it is considered that local unevenness may occur when the feeding conductive spring plate and the grounding conductive spring plate are separately spot-welded to the middle frame antenna 430, and a specific space is needed for each of the feeding conductive spring plate and the grounding conductive spring plate to ensure contact with the first antenna spring contact 810 and the second antenna spring contact 820. Therefore, a specific spacing distance needs to be reserved between the feeding conductive spring plate and the grounding conductive spring plate. In the solution in the embodiments of this application, because there is no need to separately use the feeding conductive spring plate and the grounding conductive spring plate, the spacing distance that needs to be reserved between the feeding conductive spring plate and the grounding conductive spring plate is canceled, further reducing an occupied space, additionally resolving a problem that because a length of the feeding conductive spring plate, a length of the grounding conductive spring plate, and the spacing distance between the feeding conductive spring plate and the grounding conductive spring plate are considered, a length required in the solution of separately using the feeding conductive spring plate and the grounding conductive spring plate is longer than a length of the middle frame antenna 430 electrically connected to the feeding conductive spring plate and the grounding conductive spring plate, a large space needs to be occupied, and it is difficult to use in a small space.
In addition, compared with a solution in which a single feeding conductive spring plate or a single grounding conductive spring plate is used, an area of the conductive spring plate 600 used in the terminal device 1 provided in the embodiments of this application is large, facilitating subsequent limitation and fixing of the conductive spring plate 600. In addition, an area of the fixing portion 630a used as a central spot welding region in the conductive spring plate 600 is also large, facilitating improvement of welding strength between the fixing portion 630a and the middle frame antenna 430, thereby facilitating improvement of connection strength between the conductive spring plate 600 and the middle frame antenna 430. In addition, because an area of an electrical welding region of the fixing portion 630a is large, a heat dissipation effect is good during spot welding, so that thermal deformation of the insulating part 440 beside the middle frame antenna 430 can be well avoided.
In another aspect, in the terminal device 1 provided in the embodiments of this application, the conductive spring plate 600 is disposed between the middle frame antenna 430 and the first antenna spring contact 810 and the second antenna spring contact 820. In this way, a problem that a current corresponding to the middle frame antenna 430 during operation is nonlinear due to direct contact between the middle frame antenna 430 and the first antenna spring contact 810 and the second antenna spring contact 820, and a frequency multiplication harmonic is generated, thereby interfering with an RSE (Radiated Spurious Emission, radiated spurious emission) of another antenna can be avoided.
In addition, when the middle frame antenna 430 is distant from the first circuit board 510, it is difficult to electrically connect the first circuit board 510 to the middle frame antenna 430 by using only the first antenna spring contact 810 and the second antenna spring contact 820, so that the middle frame antenna 430 cannot be fed by using the first circuit board 510. In the terminal device 1 in the embodiments of this application, the first antenna spring contact 810 and the second antenna spring contact 820 are fixed and electrically connected by using the second circuit board 710 in the circuit board assembly 700, to implement an electrical connection between the circuit board assembly 700 and the middle frame antenna 430. In addition, the second circuit board 710 is electrically connected to the first circuit board 510 by using the electrical connector 720 in the circuit board assembly 700, and a feature of flexible routing of the electrical connector 720 is used, to implement an electrical connection between the distant first circuit board 510 and the middle frame antenna 430 by using the circuit board assembly 700, so that a problem that it is difficult to feed the middle frame antenna 430 by using the first circuit board 510 because the middle frame antenna 430 is distant from the first circuit board 510 can be resolved, and a space in the terminal device 1 can be effectively used. In addition, the first antenna spring contact 810 and the second antenna spring contact 820 are fixed by using the second circuit board 710, which can improve mounting stability of the first antenna spring contact 810 and the second antenna spring contact 820, and prevent the first antenna spring contact 810 and the second antenna spring contact 820 from moving when being flexibly in contact with the conductive spring plate 600.
Refer to FIG. 8 and FIG. 9. FIG. 8 is a schematic diagram of a partial structure of a terminal device according to Comparative Example 1, and FIG. 9 is a schematic curve diagram of a return loss and radiation efficiency of the middle frame antenna 430 in the terminal device 1 according to Embodiment 1 and a middle frame antenna 430 in the terminal device according to Comparative Example 1. In FIG. 9, an abscissa represents a frequency (in GHz) and an ordinate is a return loss (in dB). In FIG. 9, Curve 1 represents a radiation efficiency curve of the middle frame antenna 430 of the terminal device 1 according to Embodiment 1, Curve 2 represents a radiation efficiency curve of the middle frame antenna 430 of the terminal device according to Comparative Example 1, Curve 3 represents a return loss curve of the middle frame antenna 430 of the terminal device 1 according to Embodiment 1, and Curve 4 represents a return loss curve of the middle frame antenna 430 of the terminal device according to Comparative Example 1.
Comparative Example 1 provides a terminal device. A difference between the terminal device according to Comparative Example 1 and the terminal device 1 according to Embodiment 1 lies in that the terminal device 1 according to Comparative Example 1 separately uses a feeding conductive spring plate 601 and a grounding conductive spring plate 602.
Specifically, in the terminal device according to Comparative Example 1, the feeding conductive spring plate 601 and the grounding conductive spring plate 602 are separately welded to the middle frame antenna 430. Both a first antenna spring contact 810 and a second antenna spring contact 820 are fixedly connected to a second circuit board 710 in a circuit board assembly 700, are electrically connected to the second circuit board 710, and are flexibly in contact with the feeding conductive spring plate 601 and the grounding conductive spring plate 602 respectively.
The middle frame antenna 430 in the terminal device 1 according to Embodiment 1 and the middle frame antenna 430 in the terminal device according to Comparative Example 1 are taken for a simulation experiment, and a curve of a return loss (S11) and radiation efficiency of the middle frame antenna 430 is shown in FIG. 9. It may be seen from FIG. 9 that a return loss S11 of the middle frame antenna 430 according to Embodiment 1 and a return loss S11 of the middle frame antenna 430 according to Comparative Example 1 are small, and antenna performance is good. A frequency band covered by radiation efficiency of the middle frame antenna 430 according to Embodiment 1 is basically consistent with a frequency band covered by radiation efficiency of the middle frame antenna 430 according to Comparative Example 1, and a frequency band of 3.4 GHZ to 3.6 GHZ (namely, an N78 frequency band) and a frequency band of 5 GHZ to 6 GHZ (namely, a 5G frequency band) may be covered.
A simulation experiment result indicates that in the terminal device 1 provided in the embodiments of this application, the middle frame antenna 430 is fed and grounded simultaneously by using the conductive spring plate 600. The conductive spring plate 600 can be used in a small space. In addition, a small return loss of the middle frame antenna 430 can be ensured, antenna performance is good, a coverage frequency band is wide, and an application prospect is good.
Refer to FIG. 10. FIG. 10 is a schematic diagram of a partial structure of a terminal device 1 according to Embodiment 2 of this application.
A difference between the terminal device 1 in Embodiment 2 and the terminal device 1 in Embodiment 1 lies in that both a structure and a mounting location of a conductive spring plate 600 in the terminal device 1 in Embodiment 2 are different from those of the conductive spring plate 600 in the terminal device 1 in Embodiment 1.
Specifically, in the terminal device 1 in Embodiment 2, a first circuit board 510 and a middle frame antenna 430 are disposed opposite to each other and at an interval from each other. The conductive spring plate 600 is located between the first circuit board 510 and the middle frame antenna 430, and is fixedly connected to an inner side of the middle frame antenna 430. Both a first antenna spring contact 810 and a second antenna spring contact 820 are fixedly mounted on a surface of the first circuit board 510 away from a rear cover 110, are disposed at an interval from each other, and are flexibly in contact with a surface of the conductive spring plate 600 away from the rear cover 110. Both the first antenna spring contact 810 and the second antenna spring contact 820 are electrically connected between the first circuit board 510 and the conductive spring plate 600.
Refer to FIG. 11. FIG. 11 is a schematic diagram of a structure of the conductive spring plate 600 in the partial structure shown in FIG. 10. Dotted lines in FIG. 11 represent merely region division of each part of the conductive spring plate 600, and do not represent actual structures.
The conductive spring plate 600 includes a feeding portion 610b, a grounding portion 620b, a fixing portion 630b, and a connecting portion 640b. The feeding portion 610b, the grounding portion 620b, and the connecting portion 640b are all fixedly connected to the fixing portion 630b on a same side. The feeding portion 610b and the grounding portion 620b are disposed at an interval from each other, and the connecting portion 640b is connected between the feeding portion 610b and the grounding portion 620b. In this embodiment, the feeding portion 610b, the grounding portion 620b, the fixing portion 630b, and the connecting portion 640b are integrally formed. The fixing portion 630b is configured to be fixedly connected to the inner side of the middle frame antenna 430. Exemplarily, the fixing portion 630b may be fixedly connected to the middle frame antenna 430 by welding.
In this embodiment, a plane on which the feeding portion 610b is located and a plane on which the fixing portion 630b is located are connected at an angle. In other words, the feeding portion 610b and the fixing portion 630b are not on a same plane. A plane on which the grounding portion 620b is located and the plane on which the fixing portion 630b is located are connected at an angle. In other words, the grounding portion 620b and the fixing portion 630b are not on a same plane. The feeding portion 610b and the grounding portion 620b are located on a same plane. Exemplarily, the angle between the plane on which the feeding portion 610b is located and the plane on which the fixing portion 630b is located is θ1, θ1 is greater than 0, the angle between the plane on which the grounding portion 620b is located and the plane on which the fixing portion 630b is located is θ2, and θ2 is greater than 0. In this embodiment, θ1 is equal to θ2, and both θ1 and θ2 are obtuse angles.
Refer to FIG. 12. FIG. 12 is a schematic diagram of a structure after an insulating part 440 is removed from the partial structure shown in FIG. 10. An arrow direction in FIG. 12 represents merely a schematic flowing path of a current.
In the assembled terminal device 1, the fixing portion 630b in the conductive spring plate 600 is fixedly connected to the inner side of the middle frame antenna 430, so that the conductive spring plate 600 is fixedly connected to the inner side of the middle frame antenna 430. The feeding portion 610b, the grounding portion 620b, and the first circuit board 510 are approximately located on a same plane. The first antenna spring contact 810 is flexibly in contact with a surface of the feeding portion 610b away from the rear cover 110 in the conductive spring plate 600, and is electrically connected to the feeding portion 610b. The second antenna spring contact 820 is flexibly in contact with a surface of the grounding portion 620b away from the rear cover 110 in the conductive spring plate 600, and is electrically connected to the grounding portion 620b. The feeding portion 610b and the first circuit board 510 are located on a same side of the first antenna spring contact 810, and the grounding portion 620b and the first circuit board 510 are located on a same side of the second antenna spring contact 820.
The first circuit board 510 may direct the current to the feeding portion 610b of the conductive spring plate 600 sequentially through a signal feed point and the first antenna spring contact 810 flexibly in contact with the feeding portion 610b. The current in the feeding portion 610b flows into the fixing portion 630b, and through the fixing portion 630b, flows into the middle frame antenna 430 welded to the fixing portion 630b, to feed the middle frame antenna 430. In this case, other than the middle frame antenna 430 being used as an antenna radiator, the conductive spring plate 600 fixedly connected to the middle frame antenna 430 may also be used as the antenna radiator, which is equivalent to that the antenna radiator becomes thicker, improving antenna signal quality of the terminal device 1.
The current flowing into the feeding portion 610b may further flow into the connecting portion 640b. Both the current flowing into the connecting portion 640b and the current flowing into the fixing portion 630b may flow into the grounding portion 620b, the current flowing into the middle frame antenna 430 flows into the grounding portion 620b through the fixing portion 630b, and then the current flowing into the grounding portion 620b is connected to a ground feed point of the first circuit board 510 through the second antenna spring contact 820 flexibly in contact with the grounding portion 620b, to ground the middle frame antenna 430.
Compared with a manner in which the feeding portion 610a and the grounding portion 620a in the conductive spring plate 600 are located on two opposite sides of the fixing portion 630a in Embodiment 1, in the terminal device 1 provided in this embodiment, because the feeding portion 610b and the grounding portion 620b in the conductive spring plate 600 are located on the same side of the fixing portion 630b, in a case that a length of the fixing portion 630b is fixed, a length of the conductive spring plate 600 in this embodiment is shorter, and space occupation of the conductive spring plate 600 in a length direction can be reduced, thereby facilitating feeding and grounding the middle frame antenna 430 in a small space. In a case that an occupied space of the conductive spring plate 600 in the length direction is fixed, which is equivalent to that an extension length of the fixing portion 630b is increased, a welding area of the conductive spring plate 600 and the middle frame antenna 430 can be increased, thereby improving connection stability between the conductive spring plate 600 and the middle frame antenna 430.
In addition, the fixing portion 630b, the feeding portion 610b, and the grounding portion 620b in the conductive spring plate 600 in this embodiment are not located on a same plane, so that the conductive spring plate 600 can be fixedly connected to the inner side of the middle frame antenna 430, and the feeding portion 610b and the grounding portion 620b of the conductive spring plate 600 and the first circuit board 510 can be approximately located on a same plane, thereby facilitating an electrical connection between the first circuit board 510 and the conductive spring plate 600 by using the first antenna spring contact 810 and the second antenna spring contact 820. A connection manner is simple, an occupied space is small, and this is applicable to a scenario in which the middle frame antenna 430 is close to the first circuit board 510.
In addition, because the feeding portion 610b, the grounding portion 620b, and the fixing portion 630b are not located on a same plane, the feeding portion 610b and the grounding portion 620b are prone to be disconnected from the fixing portion 630b under an action of an external force. The connecting portion 640b is disposed between the feeding portion 610b and the grounding portion 620b, and the connecting portion 640b is connected to the fixing portion 630b, so that connection strength among the feeding portion 610b, the grounding portion 620b, and the fixing portion 630b can be enhanced, to avoid disconnection of the feeding portion 610b or the grounding portion 620b from the fixing portion 630b. In addition, a current flowing from the feeding portion 610b may also flow into the fixing portion 630b along the connecting portion 640b, and flow into the middle frame antenna 430 through the fixing portion 630b, to feed the middle frame antenna 430. In this case, the added connecting portion 640b may also be used as the antenna radiator, and performance of the antenna radiator can be further improved, thereby facilitating improvement of antenna signal quality of the terminal device 1.
The foregoing descriptions are merely specific implementations of the present invention, but are not intended to limit the protection scope of the present invention. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in the present invention shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

A terminal device, wherein the terminal device comprises a middle frame antenna and a conductive spring plate, the conductive spring plate is mounted on an inner side of the middle frame antenna, the conductive spring plate comprises a feeding portion, a fixing portion, and a grounding portion, the fixing portion is fixedly connected to the middle frame antenna, both the feeding portion and the grounding portion are fixedly connected to the fixing portion, the feeding portion is configured to feed the middle frame antenna, and the grounding portion is configured to ground the middle frame antenna.
The terminal device according to claim 1, wherein the feeding portion and the grounding portion are connected to the fixing portion on two opposite sides.
The terminal device according to claim 2, wherein the terminal device further comprises a first circuit board, a first antenna spring contact, and a second antenna spring contact, the first antenna spring contact is electrically connected between the first circuit board and the feeding portion of the conductive spring plate, and the second antenna spring contact is electrically connected between the first circuit board and the grounding portion of the conductive spring plate.
The terminal device according to claim 3, wherein the terminal device further comprises a circuit board assembly, the first circuit board is electrically connected to the circuit board assembly, both the first antenna spring contact and the second antenna spring contact are mounted on the circuit board assembly and are disposed at an interval from each other, the first antenna spring contact is electrically connected between the circuit board assembly and the feeding portion of the conductive spring plate, and the second antenna spring contact is electrically connected between the circuit board assembly and the grounding portion of the conductive spring plate.
The terminal device according to claim 4, wherein the circuit board assembly comprises a second circuit board and an electrical connector, both the first antenna spring contact and the second antenna spring contact are mounted on the second circuit board and are electrically connected to the second circuit board, and the electrical connector is electrically connected between the second circuit board and the first circuit board.
The terminal device according to claim 5, wherein the second circuit board comprises a first part and a second part, the first part and the conductive spring plate are disposed opposite to and at an interval from each other, both the first antenna spring contact and the second antenna spring contact are mounted on a surface of the first part facing the conductive spring plate, the second part is fixedly connected to the first part, and the electrical connector is electrically connected between the second part and the first circuit board.
The terminal device according to claim 6, wherein the first circuit board and the second part are disposed opposite to and at an interval from each other, the terminal device further comprises a speaker module, the speaker module is located between the first circuit board and the second part, and the electrical connector is electrically connected to the second part and extends along an edge of the speaker module to be electrically connected to the first circuit board.
The terminal device according to claim 1, wherein both the feeding portion and the grounding portion are connected to the fixing portion on a same side, and are disposed at an interval from each other.
The terminal device according to claim 8, wherein the feeding portion and the fixing portion are connected at an angle, and the grounding portion and the fixing portion are connected at an angle.
The terminal device according to claim 9, wherein an angle between a plane on which the feeding portion is located and a plane on which the fixing portion is located is θ1, θ1 is an obtuse angle, an angle between a plane on which the grounding portion is located and the plane on which the fixing portion is located is θ2, and θ2 is an obtuse angle.
The terminal device according to claim 10, wherein θ1 is equal to θ2.
The terminal device according to any one of claims 8 to 11, wherein the conductive spring plate further comprises a connecting portion, the connecting portion, the feeding portion, and the grounding portion are located on the same side of the fixing portion, and the connecting portion is fixedly connected to the fixing portion and is connected between the feeding portion and the grounding portion.
The terminal device according to any one of claims 8 to 11, wherein the terminal device further comprises a first circuit board, a first antenna spring contact, and a second antenna spring contact, both the first antenna spring contact and the second antenna spring contact are mounted on the first circuit board and are disposed at an interval from each other, the first antenna spring contact is electrically connected between the first circuit board and the feeding portion of the conductive spring plate, and the second antenna spring contact is electrically connected between the first circuit board and the grounding portion of the conductive spring plate.
The terminal device according to claim 13, wherein the feeding portion and the first circuit board are located on a same side of the first antenna spring contact, and the grounding portion and the first circuit board are located on a same side of the second antenna spring contact.
The terminal device according to claim 1, wherein the terminal device comprises a first housing, a second housing, and a rotating shaft, the rotating shaft is connected between the first housing and the second housing, and the first housing comprises the middle frame antenna.
The terminal device according to claim 1, wherein the terminal device comprises a rear cover and a middle frame, and the middle frame is disposed on a periphery of the rear cover and comprises the middle frame antenna.
The terminal device according to claim 1, wherein the feeding portion, the fixing portion, and the grounding portion are integrally formed.