Electronic equipment

Abstract

The invention relates to an electronic device which comprises a middle frame, a mainboard, a mainboard support and a first screen module which are arranged in a stacked mode, the middle frame comprises a supporting part and a frame surrounding the supporting part, and at least part of the frame forms an antenna radiator. A first resonant cavity is formed between the first screen module and the mainboard support corresponding to the range of the antenna radiator, and / or a second resonant cavity is formed between the mainboard and the mainboard support corresponding to the range of the antenna radiator; wherein a first radiation opening of the first resonant cavity faces the antenna radiator; a second radiation opening of the second resonant cavity faces the antenna radiator. Therefore, the current direction of the first radiation opening and the current direction of the second radiation opening can be the same as the current direction of the side, opposite to the antenna radiator, of the supporting part, so that the antenna performance of the antenna radiator is effectively improved, and the communication experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of terminals, and in particular, to an electronic device. BACKGROUND

[0002] With the continuous progress of science and technology, the form of intelligent terminals is also constantly expanding. For example, foldable electronic devices (such as foldable mobile phones) that can be folded up and down have appeared on the market. Compared with traditional electronic devices, foldable electronic devices usually add a secondary screen. However, the secondary screen affects the antenna performance of the electronic device, thereby affecting the user's communication experience. SUMMARY

[0003] To overcome the problems in the related art, the present disclosure provides an electronic device.

[0004] The present disclosure provides an electronic device, which comprises a middle frame, a mainboard, a mainboard support and a first screen module arranged in layers. The middle frame comprises a support part and a frame surrounding the support part. At least part of the frame forms an antenna radiator. A first resonant cavity is formed between the first screen module and the mainboard support corresponding to the range of the antenna radiator, and / or a second resonant cavity is formed between the mainboard and the mainboard support corresponding to the range of the antenna radiator. The first radiation opening of the first resonant cavity faces the antenna radiator. The second radiation opening of the second resonant cavity faces the antenna radiator.

[0005] In some embodiments of the present disclosure, a grounding point and a feeding point are arranged on the antenna radiator. The support part generates current strong points corresponding to the positions of the grounding point and the feeding point. Along the extension direction of the antenna radiator, the first difference between the radiation aperture of the first radiation opening and the distance between the two current strong points is less than or equal to a first set threshold.

[0006] In some embodiments of the present disclosure, the first difference includes that the radiation aperture of the first radiation opening is greater than the length of the distance between the two current strong points, or the radiation aperture of the first radiation opening is less than the length of the distance between the two current strong points. The first set threshold is 20% of the distance between the two current strong points.

[0007] In some embodiments of the present disclosure, the first resonant cavity comprises a first metal layer of the first screen module, a second metal layer of the mainboard support, and a first conductive structure connecting the first metal layer and the second metal layer.

[0008] In some embodiments of the present disclosure, the first conductive structure is provided in a plurality, the plurality of first conductive structures are dispersedly arranged between the first metal layer and the second metal layer, one of the plurality of first conductive structures is arranged at a position corresponding to the grounding point, and another of the plurality of first conductive structures is arranged at a position corresponding to the feeding point.

[0009] In some embodiments of the present disclosure, the first conductive structure comprises conductive foam.

[0010] In some embodiments of the present disclosure, the antenna radiator is provided with a rib position protruding towards the mainboard, and the rib position constitutes the grounding point.

[0011] In some embodiments of the present disclosure, along the extension direction of the antenna radiator, a second difference between the radiation aperture of the second radiation opening and the length of the antenna radiator is less than or equal to a second set threshold.

[0012] In some embodiments of the present disclosure, the second difference comprises that the radiation aperture of the second radiation opening is greater than the length of the antenna radiator, or the radiation aperture of the second radiation opening is less than the length of the antenna radiator; and the second set threshold is 20% of the length of the antenna radiator.

[0013] In some embodiments of the present disclosure, the second resonant cavity comprises the mainboard, a second metal layer of the mainboard support, and a second conductive structure connecting the mainboard and the second metal layer.

[0014] In some embodiments of the present disclosure, the second conductive structure is provided in a plurality, the plurality of second conductive structures are dispersedly arranged between the mainboard and the second metal layer, one of the plurality of second conductive structures is arranged at a position corresponding to the first end of the antenna radiator, and another of the plurality of second conductive structures is arranged at a position corresponding to the second end of the antenna radiator.

[0015] In some embodiments of the present disclosure, the second conductive structure comprises a first screw.

[0016] In some embodiments of the present disclosure, at least one connecting piece is arranged between the mainboard and the mainboard support corresponding to the range where the antenna radiator is located, and each connecting piece is used to fix the mainboard to the mainboard support.

[0017] In some embodiments of the present disclosure, each of the connecting members is an insulating structure member; or the mainboard support further comprises a plastic part outside the second metal layer on the mainboard support, at least one of the connecting members is a third conductive structure, and the plastic part and the mainboard are connected through the third conductive structure.

[0018] In some embodiments of the present disclosure, the third conductive structure comprises a second screw.

[0019] In some embodiments of the present disclosure, the electronic device further comprises a second screen module, which is arranged on a side of the middle frame away from the first screen module.

[0020] In some embodiments of the present disclosure, the middle frame comprises a first frame body and a second frame body capable of relative rotation, the mainboard is arranged on the first frame body, and the first screen module is arranged on the second frame body.

[0021] The technical scheme provided by the embodiments of the present disclosure can have the following beneficial effects:

[0022] The electronic device provided by the present disclosure is provided with a middle frame, a mainboard, a mainboard support and a first screen module in a stacked manner, at least part of the frame of the middle frame forms an antenna radiator, the antenna radiator and the side of the supporting part of the middle frame opposite to the antenna radiator can jointly radiate signals, a first resonant cavity is formed between the first screen module and the mainboard support corresponding to the range of the antenna radiator and / or a second resonant cavity is formed between the mainboard and the mainboard support corresponding to the range of the antenna radiator, the first radiation opening of the first resonant cavity and the second radiation opening of the second resonant cavity are both directed towards the antenna radiator. In this way, the current direction at the first radiation opening and the current direction at the second radiation opening can both be the same as the current direction on the side of the supporting part opposite to the antenna radiator, thereby effectively improving the antenna performance of the antenna radiator and further improving the communication experience of the user.

[0023] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0025] Figure 1 is a structural schematic diagram of a middle frame of an electronic device according to an exemplary embodiment;

[0026] Figure 2 is a cooperation schematic diagram of a first screen module and a mainboard support according to an exemplary embodiment;

[0027] Figure 3 Fig. 1 is a structural schematic diagram of a mainboard support according to an example embodiment;

[0028] Figure 4 Fig. 2 is a schematic diagram of the cooperation between a mainboard and a second metal layer on the mainboard support according to an example embodiment;

[0029] Figure 5 Fig. 3 is a schematic diagram of the current flow when a first screen module and the mainboard support form a first resonant cavity according to an example embodiment;

[0030] Figure 6 Fig. 4 is a schematic diagram of the current when a first screen module and the mainboard support form a first resonant cavity according to an example embodiment;

[0031] Figure 7 Fig. 5 is a comparison diagram of the radiation efficiency of an antenna radiator according to an example embodiment.

[0032] In the drawings:

[0033] 1 - electronic device; 11 - middle frame; 111 - support part; 112 - frame; 113 - antenna radiator; 1131 - grounding point; 1132 - feeding point; 12 - mainboard; 13 - mainboard support; 131 - second metal layer; 14 - first conductive structure; 15 - second conductive structure; 16 - connecting piece; 17 - first screen module. DETAILED DESCRIPTION

[0034] The example embodiments will be described in detail below with reference to the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following example embodiments do not represent all implementations consistent with the present disclosure. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0035] With the continuous progress of technology, the form of intelligent terminals is also constantly expanding. For example, foldable electronic devices (e.g., foldable mobile phones) that can be folded up and down have appeared on the market. Compared with traditional electronic devices, foldable electronic devices usually increase a secondary screen. However, the secondary screen affects the antenna performance of the electronic device, thereby affecting the user's communication experience. For example, an electronic device includes a middle frame, a primary screen, and a secondary screen arranged on opposite sides of the middle frame. The frame of the middle frame forms an antenna radiator. Since the secondary screen contains multiple metal layers, the radiation efficiency of the antenna radiator is affected, that is, the antenna performance of the electronic device is affected.

[0036] To solve the above technical problems, the present disclosure provides an electronic device, which is provided with a middle frame, a mainboard, a mainboard support and a first screen module in a stacked manner. At least part of the frame of the middle frame forms an antenna radiator. The antenna radiator and the side of the supporting part of the middle frame opposite to the antenna radiator can jointly radiate signals. A first resonant cavity is formed between the first screen module and the mainboard support corresponding to the range of the antenna radiator and / or a second resonant cavity is formed between the mainboard and the mainboard support corresponding to the range of the antenna radiator. The first radiation opening of the first resonant cavity and the second radiation opening of the second resonant cavity are both directed towards the antenna radiator. In this way, the current direction at the first radiation opening and the current direction at the second radiation opening can both be the same as the current direction on the side of the supporting part opposite to the antenna radiator, thereby effectively improving the antenna performance of the antenna radiator and further improving the communication experience of the user.

[0037] An example embodiment of the present disclosure provides an electronic device, which can be a mobile device such as a mobile phone (e.g. a foldable mobile phone), a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (PDA), or a non-mobile device such as a personal computer (PC), a television (TV), a teller machine or a self-service machine.

[0038] As shown in Figure 1 , Figure 2 and Figure 4 , the electronic device 1 includes a middle frame 11, a mainboard 12, a mainboard support 13 and a first screen module 17 stacked in a stacked manner. The mainboard support 13 is used to fix the mainboard 12, thereby improving the stability of the arrangement of the mainboard 12 and being conducive to improving the reliability of the electronic device 1.

[0039] The middle frame 11 includes a supporting part 111 and a frame 112 surrounding the supporting part 111. At least part of the frame 112 forms an antenna radiator 113. For example, part of the frame 112 can be used as the antenna radiator 113, or the entire structure of the frame 112 can be used as the antenna radiator 113.

[0040] Generally, the antenna radiator 113 and the side of the support part 111 opposite to the antenna radiator 113 can jointly radiate signals. For example, since the support part 111 generally contains a metal structure (for example, a steel sheet), in order to avoid the support part 111 affecting the radiation performance of the antenna radiator 113, the support part 111 and the antenna radiator 113 are spaced apart by a hollow structure. When the antenna radiator 113 radiates signals in a low frequency band, that is, the antenna radiator 113 is used as a low frequency antenna, the current on the antenna radiator 113 can be coupled to the support part 111, and then the current on the antenna radiator 113 flows along the edge of the hollow structure to form a complete current return path. The current coupled to the support part 111 and the current on the antenna radiator 113 jointly radiate signals. At this time, the current direction on the side of the support part 111 opposite to the antenna radiator 113 is opposite to the current direction on the antenna radiator 113. Through simulation, it can be known that when the antenna radiator 113 radiates signals in the N28 frequency band, the current on the side of the support part 111 opposite to the antenna radiator 113 is more. When the antenna radiator 113 radiates signals in other frequency bands, for example, the B28 frequency band or the medium-high frequency band, the current on the side of the support part 111 opposite to the antenna radiator 113 is more.

[0041] Based on this, in the embodiment, a first resonance cavity is formed between the first screen module 17 and the mainboard support 13 corresponding to the range of the antenna radiator 113, that is, corresponding to the length range of the antenna radiator 113, and the first radiation opening of the first resonance cavity faces the antenna radiator 113. The current on the antenna radiator 113 can also be coupled to the first radiation opening of the first resonance cavity, and then the current coupled to the first radiation opening and the current on the antenna radiator 113 jointly form a complete current return path. At this time, the current direction on the first radiation opening is opposite to the current direction on the antenna radiator 113, and then the current direction of the first radiation opening in the length direction of the antenna radiator 113 is the same as the current direction on the side of the support part 111 opposite to the antenna radiator 113 (as shown in the current flow direction schematic diagram shown in Figure 5 and the current schematic diagram shown in Figure 6 ), so that the current of the first radiation opening in the length direction of the antenna radiator 113 can be mutually complementary with the current on the side of the support part 111 opposite to the antenna radiator 113. In this way, the antenna performance of the antenna radiator 113 can be effectively improved, and in particular, the radiation efficiency of the antenna radiator 113 radiating signals in a low frequency band is improved, thereby improving the communication experience of the user.

[0042] In another embodiment, a second resonant cavity is formed between the main plate 12 and the main plate support 13 corresponding to the range of the antenna radiator 113, i.e. the length range of the antenna radiator 113, and the second radiation opening of the second resonant cavity faces the antenna radiator 113. Similarly, the current on the antenna radiator 113 also couples to the second radiation opening of the second resonant cavity, and the current on the second radiation opening and the current on the antenna radiator 113 together form a complete current return path. At this time, the current direction on the second radiation opening is opposite to the current direction on the antenna radiator 113, and the current direction of the second radiation opening along the length direction of the antenna radiator 113 is the same as the current direction on the side of the support part 111 opposite to the antenna radiator 113, so that the current of the second radiation opening along the length direction of the antenna radiator 113 can be complementary to the current on the side of the support part 111 opposite to the antenna radiator 113. In this way, the antenna performance of the antenna radiator 113 can be effectively improved, especially the radiation efficiency of the antenna radiator 113 radiating low-frequency signals is improved, thereby improving the communication experience of the user.

[0043] In another embodiment, a first resonant cavity is formed between the first screen module 17 and the main plate support 13 corresponding to the range of the antenna radiator 113, and the first radiation opening of the first resonant cavity faces the antenna radiator 113. At the same time, a second resonant cavity is formed between the main plate 12 and the main plate support 13 corresponding to the range of the antenna radiator 113, and the second radiation opening of the second resonant cavity faces the antenna radiator 113. In this way, under the joint action of the first resonant cavity and the second resonant cavity, the current direction of the first radiation opening along the length direction of the antenna radiator 113 and the current direction of the second radiation opening along the length direction of the antenna radiator 113 are the same as the current direction on the side of the support part 111 opposite to the antenna radiator 113, so that the antenna performance of the antenna radiator 113 can be further improved, especially the radiation efficiency of the antenna radiator 113 radiating low-frequency signals is improved.

[0044] In combination Figure 1 and Figure 2In an embodiment, the antenna radiator 113 is provided with a grounding point 1131 and a feeding point 1132. In this way, the antenna radiator 113 can radiate signals outwardly, and the antenna performance of the antenna radiator 113 can be further improved. The support part 111 has current strong points corresponding to the positions of the grounding point 1131 and the feeding point 1132. Generally, the current at the grounding point 1131 and the feeding point 1132 of the antenna radiator 113 is strong, and the current at the positions of the support part 111 corresponding to the grounding point 1131 and the feeding point 1132 is also strong, i.e., the support part 111 has current strong points corresponding to the positions of the grounding point 1131 and the feeding point 1132. In the extension direction of the antenna radiator 113, the first difference between the radiation aperture of the first radiation opening and the distance between the two current strong points is less than or equal to a first threshold. In this way, the current of the first radiation opening in the length direction of the antenna radiator 113 can complement the current on the side of the support part 111 opposite to the antenna radiator 113, thereby effectively improving the antenna performance of the antenna radiator 113.

[0045] In an embodiment, the first difference includes that the radiation aperture of the first radiation opening is greater than the length of the distance between the two current strong points, or the radiation aperture of the first radiation opening is less than the length of the distance between the two current strong points. The first threshold is 20% of the distance between the two current strong points. That is, in the extension direction of the antenna radiator 113, the radiation aperture of the first radiation opening can be equal to the distance between the two current strong points, the radiation aperture of the first radiation opening can be greater than the distance between the two current strong points, and the radiation aperture of the first radiation opening can be less than the distance between the two current strong points.

[0046] When the radiation aperture of the first radiation opening is greater than the distance between the two current strong points in the extension direction of the antenna radiator 113, the length of the distance between the two current strong points which is greater than the radiation aperture of the first radiation opening does not exceed 20% of the distance between the two current strong points. When the radiation aperture of the first radiation opening is less than the distance between the two current strong points in the extension direction of the antenna radiator 113, the length of the distance between the two current strong points which is less than the radiation aperture of the first radiation opening does not exceed 20% of the distance between the two current strong points.

[0047] In this way, the current of the first radiation opening in the length direction of the antenna radiator 113 can complement the current on the side of the support part 111 opposite to the antenna radiator 113, thereby effectively improving the antenna performance of the antenna radiator 113.

[0048] In combination with Figure 2 and Figure 3In an embodiment, the first resonant cavity includes a first metal layer of the first screen module 17, a second metal layer 131 of the mainboard support 13, and a first conductive structure 14 connecting the first metal layer and the second metal layer 131. The first metal layer may, for example, include a display layer, a touch function layer, an array substrate, and the like. The second metal layer 131 may, for example, include a steel plate for realizing the supporting effect of the mainboard support 13. The first conductive structure 14 may, for example, be conductive foam, a solder pad, a metal structure, and the like. The first resonant cavity may be formed by the first metal layer, the second metal layer 131, and the first conductive structure 14. In this way, the first resonant cavity has a simple structure, which can effectively reduce the occupation of the internal space of the electronic device 1, thereby facilitating the thin and light design of the electronic device 1.

[0049] In combination Figure 2 and Figure 3 In an embodiment, the first conductive structure 14 is provided in multiple numbers, for example, 4, 6, 7, and the like. Due to the compact and complex internal structure of the electronic device 1, multiple first conductive structures 14 are arranged between the first metal layer and the second metal layer 131, which can improve the flexibility of the arrangement position of the first conductive structure 14 while ensuring the formation of the first resonant cavity, and can avoid other electrical devices in the internal space of the electronic device 1, thereby avoiding the influence of the arrangement of the first conductive structure 14 on the normal arrangement of other electrical devices in the internal space of the electronic device 1, and improving the reliability of the electronic device 1. Adjacent two first conductive structures 14 form a radiation opening, and the electromagnetic wave in the first resonant cavity can be emitted from each radiation opening. As long as the first difference between the radiation aperture of the first radiation opening of the first resonant cavity opposite to the antenna radiator 113 and the distance between the two current strong points on the support part 111 in the extension direction of the antenna radiator 113 is less than or equal to the first set threshold value, the first resonant cavity can be formed.

[0050] Therefore, by arranging one of the multiple first conductive structures 14 at a position corresponding to the grounding point 1131 and arranging another of the multiple first conductive structures 14 at a position corresponding to the feeding point 1132, the radiation aperture of the first radiation opening can be equal to the distance between the two current strong points on the support part 111 in the extension direction of the antenna radiator 113, thereby facilitating the improvement of the antenna performance.

[0051] In an embodiment, the first conductive structure 14 comprises conductive foam. Since the conductive foam has the characteristics of flexibility, plasticity, light weight and easy processing in addition to good conductivity, the conductive foam is used as the first conductive structure 14. The use of the conductive foam can improve the convenience of arranging the first conductive structure 14 and effectively reduce the weight of the electronic device 1, thereby facilitating the lightweight design of the electronic device 1.

[0052] In an embodiment, the antenna radiator 113 is provided with a rib position protruding towards the mainboard 12. The rib position can effectively improve the structural strength of the antenna radiator 113, thereby further improving the reliability of the electronic device 1.

[0053] In combination with Figure 1 and Figure 4 In an embodiment, along the extension direction of the antenna radiator 113, the second difference between the radiation aperture of the second radiation opening and the length of the antenna radiator 113 is less than or equal to a second set threshold.

[0054] The longer the length of the second radiation opening of the second resonant cavity along the extension direction of the antenna radiator 113, the lower the resonant frequency of the second resonant cavity. Therefore, by making the second difference between the radiation aperture of the second radiation opening and the length of the antenna radiator 113 along the extension direction of the antenna radiator 113 less than or equal to a second set threshold, the resonant frequency of the antenna radiator 113 after improving the antenna performance can be at a preset frequency. For example, when the antenna radiator 113 is used to radiate the N28 frequency band, the first resonant cavity is used for radiation and the second resonant cavity is used for auxiliary radiation. By making the radiation aperture of the second radiation opening of the second resonant cavity equal to the length of the antenna radiator 113 along the extension direction of the antenna radiator 113, the overall resonant frequency is reduced, so that the overall resonant frequency can be at the resonant frequency of the N28 frequency band. By using such a setting form, the antenna performance of the antenna radiator 113 can be effectively improved, especially the radiation efficiency of the antenna radiator 113 for radiating low-frequency signals. Figure 7 As shown in the radiation efficiency comparison diagram of the antenna radiator 113, compared with the case where the first resonant cavity and the second resonant cavity are not arranged, the low-frequency bandwidth of the antenna radiator 113 is increased and the low-frequency efficiency is improved after the first resonant cavity and the second resonant cavity are arranged.

[0055] In an embodiment, the second difference includes that the radiation aperture of the second radiation opening is greater than or less than the length of the antenna radiator 113. The second set threshold is 20% of the length of the antenna radiator 113. That is, in the extension direction of the antenna radiator 113, the radiation aperture of the second radiation opening can be equal to, greater than, or less than the length of the antenna radiator 113.

[0056] When the radiation aperture of the second radiation opening is greater than the length of the antenna radiator 113 in the extension direction of the antenna radiator 113, the length of the length of the antenna radiator 113 that the radiation aperture of the second radiation opening is greater than is not more than 20% of the length of the antenna radiator 113. When the radiation aperture of the second radiation opening is less than the length of the antenna radiator 113 in the extension direction of the antenna radiator 113, the length of the length of the antenna radiator 113 that the radiation aperture of the second radiation opening is less than is not more than 20% of the length of the antenna radiator 113. In this way, it is beneficial to make the resonant frequency of the antenna radiator 113 after improving the antenna performance at the preset frequency.

[0057] In combination Figure 4 In an embodiment, the second resonant cavity is connected by the second metal layer 131 of the mainboard support 13, the mainboard 12, and the second conductive structure 15 connecting the mainboard 12 and the second metal layer 131. The second conductive structure 15 can be, for example, conductive foam, screws, or other conductive structures. Under the enclosure of the mainboard 12, the second metal layer 131 of the mainboard support 13, and the second conductive structure 15, the second resonant cavity can be formed. With such a setting form, the setting form of the second resonant cavity is simple, which can effectively reduce the occupation of the internal space of the electronic device 1, thereby being beneficial to the thin design of the electronic device 1.

[0058] In combination Figure 4In an embodiment, the second conductive structure 15 is provided in plurality, for example, 6, 7, 9, etc. Due to the compact and complex internal structure of the electronic device 1, and further by providing the plurality of second conductive structures 15, the plurality of second conductive structures 15 are dispersedly arranged between the mainboard 12 and the second metal layer 131, which not only ensures the formation of the second resonant cavity, but also improves the flexibility of the arrangement position of the second conductive structure 15, and avoids other electrical devices in the internal structure of the electronic device 1, so as to avoid the arrangement of the second conductive structure 15 affecting the normal arrangement of other electrical devices in the internal structure of the electronic device 1, thereby improving the reliability of the electronic device 1. Adjacent two second conductive structures 15 form a radiation opening, and the electromagnetic wave in the second resonant cavity can be emitted from each radiation opening. As long as the second radiation opening opposite to the second resonant cavity and the antenna radiator 113 has a radiation aperture in the extension direction of the antenna radiator 113, and the second difference between the length of the antenna radiator 113 is less than or equal to the second set threshold value.

[0059] Therefore, by arranging one of the plurality of second conductive structures 15 at a position corresponding to the first end of the antenna radiator 113, and arranging another of the plurality of second conductive structures 15 at a position corresponding to the second end of the antenna radiator 113, the length of the second radiation opening in the extension direction of the antenna radiator 113 can be equal to the length of the antenna radiator 113, thereby facilitating the improvement of the antenna performance, and also facilitating the resonant frequency of the antenna radiator 113 after the improvement of the antenna performance to be at the preset frequency.

[0060] In an embodiment, the second conductive structure 15 includes a first screw. The first screw can be used to connect and fix the mainboard 12 and the mainboard support 13, and at the same time, the first screw is used as a conductive structure. In this way, the convenience of arranging the second conductive structure 15 is improved, and the occupation of the internal space of the electronic device 1 by the second conductive structure 15 is reduced.

[0061] In combination Figure 4 In an embodiment, at least one connecting piece 16 is arranged between the mainboard 12 and the mainboard support 13 corresponding to the range where the antenna radiator 113 is located, in order to improve the connection stability between the mainboard 12 and the mainboard support 13. For example, only one connecting piece 16 can be arranged between the mainboard 12 and the mainboard support 13 corresponding to the range where the antenna radiator 113 is located, or a plurality of connecting pieces 16, for example, 2, 3, etc. can be arranged. The mainboard 12 is fixed to the mainboard support 13 by the connecting pieces 16, thereby further improving the connection stability between the mainboard 12 and the mainboard support 13, and further improving the reliability of the electronic device 1.

[0062] In an embodiment, each of the connecting members 16 is an insulating structure member, which can be plastic, insulating tape or the like. In this way, the connecting member 16 can avoid reducing the length of the second radiation opening of the second resonant cavity along the extension direction of the antenna radiator 113, thereby ensuring the effect of improving the performance of the antenna.

[0063] In another embodiment, the mainboard support 13 further includes a plastic part wrapped outside the second metal layer 131 of the mainboard support 13. When the at least one connecting member 16 is a third conductive structure, the third conductive structure can be conductive foam, a screw or the like structure capable of conducting electricity, so that the third conductive structure connects the plastic part on the mainboard support 13 and the mainboard 12. With such a setting form, the connecting member 16 can avoid reducing the length of the second radiation opening of the second resonant cavity along the extension direction of the antenna radiator 113 while playing a connecting role, thereby ensuring the effect of improving the performance of the antenna.

[0064] In an embodiment, the third conductive structure includes a second screw. In this way, the convenience of connecting the plastic part and the mainboard 12 can be effectively improved, thereby improving the assembly efficiency of the electronic device 1.

[0065] In an embodiment, the electronic device 1 further includes a second screen module, which is arranged on the side of the middle frame 11 away from the first screen module 17. For example, the electronic device 1 can be a foldable device that is folded up and down, and the second screen module is the main screen of the electronic device 1, while the first screen module 17 is the auxiliary screen of the electronic device 1. By arranging the first screen module 17 and the second screen module, the use convenience of the electronic device 1 can be effectively improved, thereby further improving the user experience.

[0066] In an embodiment, the middle frame 11 includes a first frame body and a second frame body that can rotate relative to each other. In this way, the user can adjust the use state of the electronic device 1 according to different needs, thereby improving the user experience. For example, when the user is watching a video or playing a game, the first frame body and the second frame body are unfolded to increase the display area of the electronic device 1, thereby improving the visual effect of the user. When the user is talking, the first frame body and the second frame body are folded to reduce the volume of the electronic device 1, thereby facilitating the user's holding. The mainboard 12 is arranged on the first frame body, and the first screen module 17 is arranged on the second frame body, so as to avoid interference between the first screen module 17 and the mainboard 12, thereby further improving the reliability of the electronic device 1.

[0067] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. 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.

[0068] It should be understood that the present disclosure is not limited to the precise structures as herein described and illustrated in the drawings, and that various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. An electronic device, characterized in that, The electronic device includes a stacked mid-frame, a motherboard, a motherboard bracket, and a first screen module. The mid-frame includes a support portion and a border surrounding the support portion. At least a portion of the border forms an antenna radiator. A first resonant cavity is formed between the first screen module and the motherboard bracket corresponding to the range of the antenna radiator, and / or a second resonant cavity is formed between the motherboard and the motherboard bracket corresponding to the range of the antenna radiator. The first radiation opening of the first resonant cavity faces the antenna radiator; the second radiation opening of the second resonant cavity faces the antenna radiator.

2. The electronic device according to claim 1, characterized in that, The antenna radiator is provided with a grounding point and a feed point, and a strong current point is generated on the support part corresponding to the grounding point and the feed point. Along the extension direction of the antenna radiator, the first difference between the radiating aperture of the first radiating opening and the distance between the two current strong points is less than or equal to a first set threshold.

3. The electronic device according to claim 2, characterized in that, The first difference includes the first radiation opening having a radiation aperture larger than the length of the distance between the two current strong points, or the first radiation opening having a radiation aperture smaller than the length of the distance between the two current strong points. The first set threshold is 20% of the distance between the two current strong points.

4. The electronic device according to claim 2, characterized in that, The first resonant cavity includes: a first metal layer of the first screen module, a second metal layer of the motherboard bracket, and a first conductive structure connecting the first metal layer and the second metal layer.

5. The electronic device according to claim 4, characterized in that, Multiple first conductive structures are provided, and the multiple first conductive structures are dispersed between the first metal layer and the second metal layer. One of the multiple first conductive structures is located at the position corresponding to the grounding point, and another of the multiple first conductive structures is located at the position corresponding to the feed point.

6. The electronic device according to claim 4, characterized in that, The first conductive structure includes conductive foam.

7. The electronic device according to claim 2, characterized in that, The antenna radiator is provided with ribs that protrude toward the motherboard, and the ribs constitute the grounding point.

8. The electronic device according to any one of claims 1 to 7, characterized in that, Along the extension direction of the antenna radiator, the second difference between the radiating aperture of the second radiating opening and the length of the antenna radiator is less than or equal to a second set threshold.

9. The electronic device according to claim 8, characterized in that, The second difference includes the second radiation opening having a radiation aperture larger than the length of the antenna radiator, or the second radiation opening having a radiation aperture smaller than the length of the antenna radiator. The second set threshold is 20% of the length of the antenna radiator.

10. The electronic device according to claim 8, characterized in that, The second resonant cavity includes: the motherboard, a second metal layer of the motherboard bracket, and a second conductive structure connecting the motherboard and the second metal layer.

11. The electronic device according to claim 10, characterized in that, The second conductive structure is provided in multiple ways, and the multiple second conductive structures are dispersed between the motherboard and the second metal layer. One of the multiple second conductive structures is located at a position corresponding to the first end of the antenna radiator, and the other of the multiple second conductive structures is located at a position corresponding to the second end of the antenna radiator.

12. The electronic device according to claim 10, characterized in that, The second conductive structure includes a first screw.

13. The electronic device according to any one of claims 1 to 7, characterized in that, Corresponding to the range of the antenna radiator, at least one connector is provided between the motherboard and the motherboard bracket, and each connector is used to fix the motherboard to the motherboard bracket.

14. The electronic device according to claim 13, characterized in that, All of the aforementioned connectors are insulating structural components; or, The motherboard bracket also includes a plastic portion covering the second metal layer on the motherboard bracket, and at least one of the connectors is a third conductive structure, wherein the plastic portion is connected to the motherboard through the third conductive structure.

15. The electronic device according to claim 14, characterized in that, The third conductive structure includes a second screw.

16. The electronic device according to any one of claims 1 to 7, characterized in that, The electronic device also includes: The second screen module is disposed on the side of the middle frame opposite to the first screen module.

17. The electronic device according to claim 16, characterized in that, The mid-frame includes a first frame and a second frame that can rotate relative to each other, the motherboard is disposed in the first frame, and the first screen module is disposed in the second frame.

Images