Shell and electronic equipment

Abstract

The invention relates to the technical field of terminals, in particular to a shell and electronic equipment, and the shell comprises a bottom shell which is made of an insulating material; the middle frame is connected to the bottom shell; the antenna comprises a first conducting medium and a second conducting medium; the first conducting medium is arranged on the bottom shell; the second conducting medium is arranged in the middle frame; the first conducting medium and the second conducting medium are electrically coupled to an antenna feed point of the electronic equipment, and the joint of the bottom shell and the middle frame is insulated, so that an antenna slot is formed at the joint. According to the shell and the electronic equipment provided by the invention, the arrangement of the antenna structure can be realized by utilizing the shell structure, the miniaturization design of the electronic equipment can be conveniently realized while the antenna performance is improved, and the waterproof and dustproof design difficulty can also be reduced.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to a housing and an electronic device. Background Art

[0002] With the diversification of electronic devices' functions, higher requirements are placed on the communication performance of electronic devices. In electronic devices, multiple antennas such as Global Positioning System (GPS) antennas and Bluetooth antennas are often required. In order to meet the clearance requirements of antennas, electronic devices need to provide additional space for setting antennas.

[0003] However, with the miniaturization of electronic devices, the space currently available for setting up antennas is gradually decreasing, which not only affects the setting position of the antenna, but also affects the clearance area of ​​the antenna and the performance of the antenna, making it difficult to improve the performance of the antenna when miniaturizing the electronic device. Summary of the invention

[0004] In order to solve the above problems, the present application provides a shell and an electronic device, which can utilize the shell structure to realize the setting of the antenna structure, thereby facilitating the miniaturization design of the electronic device while improving the antenna performance, and can also reduce the difficulty of waterproof and dustproof design.

[0005] In order to achieve the above-mentioned objectives, in a first aspect, an embodiment of the present application provides a shell, which is applied to an electronic device, and the shell includes: a bottom shell, the main body material of the bottom shell is an insulating material; a middle frame, the middle frame is connected to the bottom shell; an antenna, the antenna includes a first conductive medium and a second conductive medium; the first conductive medium is arranged on the bottom shell; the second conductive medium is arranged on the middle frame; the first conductive medium and the second conductive medium are electrically coupled to the antenna feed point of the electronic device; wherein the connection between the bottom shell and the middle frame is insulated to form an antenna slot at the connection.

[0006] The shell provided in the embodiment of the present application, by setting the first conductive medium of the antenna in the bottom shell, and setting the second conductive medium in the middle frame, so as to utilize the insulation of the connection between the bottom shell and the middle frame made of insulating material to achieve an insulated connection between the first conductive medium and the second conductive medium, and the connection can form an antenna slot. In this way, the antenna design can be integrated on the shell without the need to additionally set other components, thereby helping to achieve a miniaturized design of the electronic device. At the same time, the electromagnetic wave signals of the first conductive medium in the bottom shell and the second conductive medium in the middle frame can be sent or received through the antenna slot, and form an electromagnetic field direction that is perpendicular to the user's arm to reduce the impact on the human body, thereby eliminating the need to reduce the antenna transmission efficiency and improving the performance of the antenna. In addition, the shell provided in the embodiment of the present application can also directly use the insulating bottom shell to form the antenna slot, avoiding the need to additionally set up insulating parts on the shell, thereby reducing the connection gap and facilitating the realization of a waterproof and dustproof design.

[0007] In some embodiments, the bottom case has a first surface facing away from the middle frame; the first conductive medium includes a metal layer attached to the first surface. In this way, the first conductive medium can be directly formed on the first surface, reducing the difficulty of waterproof and dustproof design of the bottom case.

[0008] In some embodiments, the middle frame includes a metal middle frame; the metal middle frame forms the second conductive medium, and the metal middle frame is a ring structure formed around the edge of the bottom shell. In this way, the middle frame structure of the shell can be directly used to form the second conductive medium, which can reduce redundant structures and facilitate the miniaturization of the shell. At the same time, using the metal middle frame to form the second conductive medium can also avoid dividing the shell middle frame into several parts, which helps to reduce the connection gap, thereby reducing the difficulty of waterproof and dustproof design.

[0009] In some embodiments, the inner layer of the middle frame is an annular structure attached to the inner side of the metal middle frame, and the material of the inner layer of the middle frame is an insulating material. In this way, the inner layer of the middle frame can be used to support the second conductive medium, and can further serve as an insulating setting for the first conductive medium and the second conductive medium.

[0010] In some embodiments, the metal middle frame and the bottom shell are enclosed to form a receiving cavity, and the receiving cavity is used to receive the circuit board; the antenna feed point is located on the circuit board. In this way, the circuit board can be used to provide an antenna feed point for the first conductive medium and the second conductive medium on the shell to maintain the normal function of the antenna.

[0011] In some embodiments, the second conductive medium is electrically coupled to the circuit board; the bottom shell is provided with a through hole, and a conductive paste is poured into the through hole to form a first conductive part; one end of the first conductive part is connected to the first conductive medium, and the other end is electrically coupled to the circuit board. In this way, the first conductive part can be used to achieve electrical connection between the first conductive medium and the circuit board on both sides of the bottom shell.

[0012] In some embodiments, the through hole includes a first hole segment and a second hole segment that are arranged in sequence from the first conductive medium to the circuit board and are interconnected; the aperture of the first hole segment is smaller than the aperture of the second hole segment. In this way, the waterproof performance of the bottom shell can be improved, and the connection area of ​​the first conductive part for electrical connection with the circuit board can be expanded.

[0013] In some embodiments, the bottom shell has a second surface opposite to the first surface; the second surface is further provided with a third conductive medium, the side of the third conductive medium facing the second surface is connected to the first conductive part, and the side of the third conductive medium facing away from the second surface is electrically coupled to the circuit board. In this way, the third conductive medium can be used to further increase the electrical connection area between the first conductive part and the circuit board, thereby improving the connection reliability.

[0014] In some embodiments, the third conductive medium includes a metal sheet, which is bonded to the second surface by in-mold bonding technology IMD, and the metal sheet has a third surface facing the circuit board; the second conductive medium has a first end surface facing the third surface; the third surface is parallel to the first end surface, so as to form a parallel electromagnetic field between the third surface and the first end surface. In this way, the first end surface can be parallel to the surface of the metal sheet to form a parallel electromagnetic field between the third surface and the first end surface, thereby improving the resonance efficiency of the electromagnetic wave signal of the antenna, thereby improving the performance of the antenna.

[0015] In some embodiments, the third conductive medium includes an antenna layer formed by a print direct molding (PDS) process; the second conductive medium has a first end face facing the second surface; the second surface is parallel to the first end face, so that the antenna layer is parallel to the first end face, and a parallel electromagnetic field is formed between the antenna layer and the first end face. In this way, the first end face can be parallel to the second surface, so that the antenna layer is parallel to the first end face, and a parallel electromagnetic field is formed between the antenna layer and the first end face. The resonance efficiency of the electromagnetic wave signal of the antenna is improved, thereby improving the performance of the antenna.

[0016] In some embodiments, the third conductive medium includes a conductive adhesive, and the conductive adhesive is arranged corresponding to the first conductive part. In this way, the conductive adhesive can be used to achieve electrical connection between the first conductive part and the circuit board.

[0017] In some embodiments, the connector is disposed on the circuit board; the connector is electrically connected to the circuit board and the third conductive medium. In this way, the circuit board and the third conductive medium can be electrically connected by the connector.

[0018] In some embodiments, the connector includes but is not limited to any one of a metal spring, a spring pin, a back-to-back BTB connector, and a conductive foam. In this way, it is convenient to achieve electrical connection when there is a certain distance between the circuit board and the third conductive medium.

[0019] In some embodiments, the bottom shell includes a device installation area, and the device installation area is used to install the sensor device of the electronic device; the first conductive medium is arranged outside the device installation area. In this way, the first conductive medium can be prevented from affecting other structures and functions of the electronic device.

[0020] In some embodiments, the device mounting area is located in the middle of the first surface, and the first conductive medium is disposed at the periphery of the device mounting area. In this way, the area of ​​the first conductive medium can be increased as much as possible without affecting other structures and functions, so as to increase the clearance area of ​​the antenna and thus improve the performance of the antenna.

[0021] In some embodiments, the metal layer is printed on the first surface by a print direct molding (PDS) process; or, the metal layer is attached to the first surface by a laser direct molding (LDS) process; or, the metal layer is attached to the first surface by a two-color injection molding copper plating / nickel plating process; or, the metal layer is formed by embedding a metal film on the first surface. In this way, the first conductive medium can be formed on the first surface.

[0022] In order to achieve the above-mentioned purpose, in a second aspect, an embodiment of the present application provides an electronic device, including a display screen and a shell as described in the first aspect above; the display screen is arranged on the side of the middle frame away from the bottom shell; the display screen, the middle frame and the bottom shell together enclose a accommodating cavity; the first conductive medium and the second conductive medium are electrically coupled to the antenna feeding point on the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 A schematic diagram of the structure of a smart watch provided in this embodiment;

[0025] Figure 2 A schematic diagram of the structure of the first intelligent host provided in this embodiment;

[0026] Figure 3 A side view of a second smart host provided in this embodiment;

[0027] Figure 4 A schematic diagram of the cooperation between the second intelligent host and the wrist in a cross-sectional state provided in this embodiment;

[0028] Figure 5 A side view of a third smart host provided in this embodiment;

[0029] Figure 6A schematic diagram of the third intelligent host provided in this embodiment cooperating with a wrist in a cutaway state;

[0030] Figure 7 A schematic diagram of the structure of the first housing provided in this embodiment;

[0031] Figure 8 For along Figure 7 The cross-sectional view in the AA direction;

[0032] Fig. 9 for Figure 8 Schematic diagram of partial structural decomposition;

[0033] Fig.10 A cross-sectional view of a second housing structure provided in this embodiment;

[0034] Fig.11 A bottom view of the first bottom shell and the first conductive medium provided in this embodiment;

[0035] Fig.12 A bottom view of the second bottom shell provided in this embodiment cooperating with the first conductive medium;

[0036] Fig.13 for Figure 8 A magnified view of part B in FIG.

[0037] Fig.14 A cross-sectional view of a third housing provided in this embodiment;

[0038] Fig.15 for Fig.14 Enlarged view of part C;

[0039] Fig.16 A schematic diagram of the structure of an electronic device provided by this embodiment from a viewing angle;

[0040] Fig.17 A schematic structural diagram of an electronic device provided by this embodiment from another perspective. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, other embodiments obtained by ordinary technicians in this field without making creative work all belong to the protection scope of the present application.

[0042] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0043] In addition, in the present application, directional terms such as "upper", "lower", "inner" and "outer" are defined relative to the orientation of the components schematically placed in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to the changes in the orientation of the components placed in the drawings.

[0044] As the functions of electronic devices become more diverse, more functional components need to be installed in the electronic devices. However, the trend of miniaturization of electronic devices makes it impossible to install more functional components in the electronic devices, which makes design difficult.

[0045] It is worth noting that the above-mentioned electronic devices may include but are not limited to mobile phones, tablet computers, smart wearable devices, personal digital assistants (PDAs), augmented reality (AR) and virtual reality (VR) devices, vehicle-mounted devices and other electronic devices. The electronic devices may also be electronic products such as electric cars, household appliances, headphones, and drones. The embodiments of the present application do not impose any special restrictions on the specific form of the electronic device.

[0046] The following description takes a smart watch as an example.

[0047] Figure 1 A schematic diagram of the structure of a smart watch provided in this embodiment.

[0048] like Figure 1 As shown, the smart watch 100 is a watch that can connect to the Internet and provide more functions. The smart watch 100 includes a wearable component 110 and a smart host 120, so that the wearable component 110 can be worn on the wrist.

[0049] The smart watch 100 includes a variety of smart functions, such as a pedometer, heart rate monitoring, real-time positioning, message push, etc. The smart watch 100 can also be connected to a smart phone or other devices (such as a tablet computer, a laptop computer, etc.) and transmit and receive data via a wireless network.

[0050] In order to facilitate the realization of the above functions, a global positioning system (GPS) antenna, a Bluetooth antenna, a wireless fidelity local area network (WiFi) antenna, etc. need to be set on the smart watch 100. These antennas can be set inside or outside the smart watch 100 according to their performance characteristics.

[0051] In one implementation, in order to reduce the impact of the internal structure of the smart watch 100 on the antenna performance, the antenna can be set on the outer surface of the smart watch 100.

[0052] Figure 2 This is a schematic diagram of the structure of the first intelligent host provided in this embodiment.

[0053] like Figure 2 As shown, specifically, a metal decorative part 130 can be provided on the outer surface of the smart host 120, and the metal decorative part 130 can be used to form an antenna. In this way, the metal decorative part 130 can not only meet the performance requirements of the antenna, but also modify the appearance of the smart watch 100. However, the metal decorative part 130 has a certain thickness and width. The metal decorative part 130 tends to increase the overall size of the smart host 120, affecting the miniaturization design of the smart watch 100.

[0054] Figure 3 A side view of the second smart host provided in this embodiment.

[0055] Figure 4 A schematic diagram of the second smart host provided in this embodiment cooperating with a wrist in a cross-sectional view.

[0056] like Figure 3 and Figure 4 As shown, in order to reduce the impact of the antenna setting on the overall size of the smart watch 100, considering that the frame of the casing of the smart host 120 is usually made of metal, the metal frame 121 can be selected to form the antenna.

[0057] The metal frame 121 is generally an annular structure, and the display panel 122 and the bottom sealing member 123 are respectively disposed on both sides of the metal frame 121 in the axial direction. The display panel 122, the metal frame 121 and the bottom sealing member 123 together form a space, so as to accommodate other structures.

[0058] The display panel 122 may include a back plate and a display layer that are stacked.

[0059] The backplane is used to provide power and control signals for the display layer, and the backplane can also support and fix the display layer. In order to facilitate the transmission of electrical signals, a conductive structure, such as a metal wire, is usually provided in the backplane.

[0060] The display layer is used to display the image, and includes multiple layer structures, such as a liquid crystal layer, a polarizer layer, a sensor, a substrate layer, a copper foil layer, etc., to facilitate the display of the image. Among them, the display layer may include a metal layer (such as a copper foil layer) and a metal wire layer (such as a sensor layer).

[0061] Exemplarily, the display panel 122 can be, for example, a liquid crystal display (LCD), an organic light-emitting diode (OLED) display panel, an active-matrix organic light emitting diode or an active-matrix organic light emitting diode (AMOLED) display panel, a Mini Led display panel, a Micro Led display panel, a Micro oLed display panel, a quantum dot light emitting diode (QLED) display panel, etc.

[0062] When the metal frame 121 is used as the antenna structure, the antenna feeding point is disposed on the display panel 122 .

[0063] Using the metal frame 121 as an antenna will have certain impacts on the design of the antenna and other structures of the smart watch 100, including the following two aspects:

[0064] Please refer again Figure 4 On the one hand, when the user wears the smart watch 100, the direction of the antenna electromagnetic field is parallel to the direction of the surface of the arm 200. Since all organs of the human body are lossy media, under the action of the antenna electromagnetic field, an induced electromagnetic field will be generated in the human body, and current will be generated to absorb and dissipate electromagnetic energy. It can be seen that when the human body wears the smart watch 100, the human body will absorb a certain amount of electromagnetic waves.

[0065] When the amount of electromagnetic waves absorbed by the human body exceeds a certain amount, it will affect human health. At this time, the impact on the human body can be reduced by reducing the transmission power of the antenna. However, reducing the transmission power of the antenna will deteriorate the signal quality of the antenna and affect the performance of the antenna.

[0066] On the other hand, when the metal frame 121 is used as an antenna, the radiation direction of the antenna is perpendicular to the display plane (eg Figure 4 It can be seen that the electromagnetic waves emitted by the antenna will pass through the location where the display panel 122 is located.

[0067] Since the display panel 122 has a metal layer, the metal layer will hinder the emission of electromagnetic waves from the antenna, affecting the performance of the antenna. To ensure the normal operation of the antenna, a certain gap H1 needs to be set between the display panel 122 and the metal frame 121, so as to form a clearance area of ​​the antenna by using the gap H1 to ensure that the antenna can normally transmit and receive electromagnetic waves.

[0068] Please combine Figure 3 and Figure 4 , a protective glass 124 is usually provided outside the display panel 122, and the protective glass 124 can be connected to the metal frame 121. The protective glass 124 is made of a light-transmitting material to transmit light from the display panel 122. When there is a gap between the display panel 122 and the metal frame 121, a black border 125 is provided at a position of the protective glass 124 corresponding to the gap to prevent the gap H1 from being exposed and affecting the appearance of the smart watch 100.

[0069] However, when the radial size of the metal frame 121 remains unchanged, the larger the clearance area required by the antenna, the larger the gap between the metal frame 121 and the display panel 122. In this way, the smaller the size of the display panel 122, the larger the area of ​​the black border 125 on the protective glass 124, resulting in a decrease in the screen-to-body ratio, affecting the user experience.

[0070] Figure 5 A side view of the third smart host provided in this embodiment.

[0071] Figure 6 A schematic diagram of the third smart host provided in this embodiment cooperating with a wrist in a cross-sectional view.

[0072] like Figure 5 and Figure 6 As shown, in order to reduce the design contradiction between human health and antenna performance and between the clearance area and the screen ratio, the designer divides the metal frame 121 into two parts, and sets an insulating member 1211 in the middle of the two parts, and uses the insulating member 1211 to form an antenna slot. In this way, the metal frames 121 set on both sides of the insulating member 1211 can be used as the first radiator 1212 and the second radiator 1213 respectively. The first radiator 1212 and the second radiator 1213 use the insulating member 1211 to form a clearance area, and their radiation direction is parallel to the direction of the human arm (such as Figure 6 b direction in the figure).

[0073] It can be seen that the first radiator 1212 and the second radiator 1213 can form an electromagnetic field perpendicular to the surface of the human arm 200, which can reduce the human body's absorption of electromagnetic waves, thereby reducing the impact on human health without reducing the antenna's transmission power, thereby improving the antenna's performance.

[0074] At the same time, by using the insulating member 1211 to provide a clearance area, it is possible to avoid affecting the structural design of the display panel 122, realize the decoupling design of the antenna and the display screen, and realize the ultimate design of the display screen without black borders, thereby facilitating the improvement of the screen-to-body ratio.

[0075] However, in the above implementation, the first radiator 1212 and the second radiator 1213 on both sides of the insulating member 1211 need to be connected to the insulating member 1211, which will result in two connection gaps at the frame of the smart host 120. The appearance of these two gaps reduces the integrity of the frame of the smart host 120 and increases the difficulty of waterproof and dustproof design of the smart host 120. At the same time, the texture of the metal material and the insulating material are different, and they will present different appearances. The existence of the gaps is easy to be observed by users, affecting the aesthetics of the smart watch 100 and the user experience.

[0076] In order to solve the above problems, this embodiment provides a shell 300 and an electronic device. The shell 300 can facilitate the miniaturization design of the electronic device while improving the antenna performance. It can also reduce the difficulty of waterproof and dustproof design, thereby improving the aesthetics of the electronic device and the user experience.

[0077] Figure 7 This is a schematic structural diagram of the first shell provided in this embodiment.

[0078] Figure 8 For along Figure 7 Cross-sectional view in the AA direction.

[0079] Fig. 9 for Figure 8 Schematic diagram of partial structural decomposition.

[0080] To facilitate the explanation of the positions of various components in the shell 300, the embodiment of the present application exemplarily establishes a three-dimensional coordinate system based on the shell 300, wherein the x-axis direction is the width direction of the shell 300, the y-axis direction is the length direction of the shell 300, and the z-axis direction is the thickness direction of the shell 300.

[0081] It is worth noting that when the housing 300 of the electronic device is circular in shape, its length and width are equal, both being the circular diameter, and at this time, the x-axis direction and the y-axis direction can be interchanged.

[0082] See also Figures 7 to 9 In some embodiments, the housing 300 includes a bottom shell 310 , a middle frame 320 , and an antenna 330 .

[0083] The main body material of the bottom shell 310 is an insulating material.

[0084] The material of the bottom shell 310 may specifically include polycarbonate (PC), acrylonitrile butadiene styrene (ABS), glass fiber reinforced material (GF) or polyamide (PA). The bottom shell 310 may be formed of a single material or a plurality of different insulating materials. In this embodiment, the specific material of the bottom shell 310 is not limited.

[0085] The middle frame 320 is connected to the bottom shell 310 , and the middle frame 320 and the bottom shell 310 can form a receiving cavity 360 for receiving other components of the electronic device, such as a battery, a sensor, and a circuit board, which will not be described in detail in this embodiment.

[0086] like Figure 8 As shown, the antenna 330 includes a first conductive medium 331 and a second conductive medium 332 .

[0087] The first conductive medium 331 is disposed on the bottom shell 310 to form a radiator of the antenna.

[0088] The second conductive medium 332 is disposed on the middle frame 320 to form another radiator of the antenna. In the z-axis direction, the first conductive medium 331 and the second conductive medium 332 are respectively located on both sides of the insulating bottom shell 310, and the connection between the bottom shell 310 and the middle frame 320 is insulated to form an antenna slot (such as Figure 8 H2 in the figure). It can be seen that the interval H2 between the first conductive medium 331 and the second conductive medium 332 can realize the insulation connection between the first conductive medium 331 and the second conductive medium 332. In this way, the bottom shell 310 can be used to realize the connection and insulation setting of the first conductive medium 331 and the second conductive medium 332, so that there is no need to set an additional insulation seam on the middle frame 320 to avoid affecting the integrity of the middle frame 320, and the gap on the middle frame 320 can be reduced, reducing the difficulty of waterproof and dustproof design and improving the appearance.

[0089] The first conductive medium 331 and the second conductive medium 332 are electrically coupled to the antenna feed point of the electronic device. The antenna feed point is the connection point between the antenna 330 and the circuit or transmission line, and may include an antenna feed point and / or an antenna feed point. In order to achieve the normal function of the antenna 330, the antenna feed point and / or the antenna feed point of the first conductive medium 331 and the antenna feed point and / or the antenna feed point of the second conductive medium 332 are electrically coupled to the electronic device, and the specific electrical coupling method is not limited in this application.

[0090] The shell 300 provided in the embodiment of the present application sets the first conductive medium 331 of the antenna 330 on the insulating bottom shell 310, sets the second conductive medium 332 on the middle frame 320, and uses the insulation at the connection between the bottom shell 310 and the middle frame 320 to form an antenna slot, so as to directly form an antenna structure on the shell 300, thereby eliminating the need to set additional decorative parts, which helps to achieve miniaturization of the electronic device. At the same time, the insulating bottom shell 310 is used to achieve the connection and insulation of the first conductive medium 331 and the second conductive medium 332 to achieve insulation isolation between the two radiators of the antenna 330, thereby eliminating the need to set additional insulating parts between the first conductive medium 331 and the second conductive medium 332, thereby reducing the connection gap, facilitating the realization of a waterproof and dustproof design, and improving the appearance. At this time, the insulating bottom shell 310 between the first conductive medium 331 and the second conductive medium 332 can be used to form a clearance area. It can be seen that the radiation direction of the antenna is parallel to Figure 8 The Y-axis direction of the antenna 330 is perpendicular to the user's arm 200. In this way, without reducing the transmission power of the antenna 330, the influence of the electromagnetic field generated by the antenna 330 on the human body can be reduced, and the performance of the antenna 330 can be improved.

[0091] like Figure 8 , Fig. 9 As shown, in some embodiments, the housing 300 may further include a light-transmitting cover plate 340 .

[0092] Along the z-axis direction, the light-transmitting cover plate 340 is arranged opposite to the bottom shell 310. It can be seen that the light-transmitting cover plate 340 is arranged on the side of the second conductive medium 332 (middle frame 320) away from the bottom shell 310. The light-transmitting cover plate 340 is used to cover and protect the display screen (not shown in the figure) of the electronic device, and at the same time, it can also allow the light of the display screen to pass through the light-transmitting cover plate 340, so that the user can watch and use the picture displayed on the display screen.

[0093] It is worth noting that, in some embodiments, the display screen surface may have a self-contained light-transmitting protective structure, so that there is no need to additionally provide a light-transmitting cover plate 340 .

[0094] Please continue reading Figures 7 to 9In one implementation, the middle frame 320 includes a metal middle frame, which is a ring structure surrounding the edge of the bottom shell 310. The metal middle frame forms a second conductive medium 332, so that the metal middle frame is used to form another radiator of the antenna 330, which can avoid the additional provision of other conductive structures and reduce the impact on the overall size of the electronic device. At the same time, the solution provided in the embodiment of the present application can replace the solution of designing an insulating member 1211 in the middle frame of the shell 300, thereby avoiding the situation of forming a connection gap on the middle frame 320, reducing the difficulty of waterproof and dustproof design of the shell 300, retaining the integrated structure of the middle frame 320, and improving the aesthetics of the electronic device and the user experience.

[0095] In addition, the annular metal middle frame can form a hollow cavity structure with the first conductive medium 331, thereby forming a cavity antenna. The radiation port of the cavity antenna is the antenna slot H2 between the first conductive medium 331 and the metal middle frame. When a high-frequency electrical signal enters the cavity, an electromagnetic wave is generated inside the cavity and emitted through the radiation port.

[0096] The cavity antenna has good decoupling performance, which can facilitate the realization of a wider working bandwidth. At the same time, the cavity antenna has good matching characteristics and its radiation efficiency is high. In addition, due to the simple structure of the cavity antenna, its working performance is relatively stable.

[0097] Exemplarily, the specific material of the above-mentioned metal middle frame can be copper, iron, silver, gold and the like, which is not limited in this embodiment.

[0098] Optionally, the annular structure of the metal middle frame may be a circular ring or a square ring. When the overall shape of the electronic device is circular, the metal middle frame may be in the shape of a circular ring; when the overall shape of the electronic device is square, the metal middle frame may be in the shape of a square ring. It may be selected according to actual conditions, and the specific shape of the metal middle frame is not limited in this embodiment.

[0099] It is understandable that the shape of the bottom shell 310 can be the same as the shape of the metal middle frame, so as to achieve a good appearance and facilitate the connection between the metal middle frame and the bottom shell 310 .

[0100] For example, when the metal middle frame is a circular ring, the bottom shell 310 may be a circular bottom shell 310. When the metal middle frame is a square ring, the bottom shell 310 may be a square bottom shell 310.

[0101] Fig.10 A cross-sectional view of the second shell structure provided in this embodiment.

[0102] like Fig.10As shown, in another implementation, the middle frame 320 further includes a middle frame inner layer 321. The middle frame inner layer 321 is an annular structure attached to the inner side of the metal middle frame, and the material of the middle frame inner layer 321 is an insulating material. In this way, the middle frame inner layer 321 can be used to further achieve an insulated connection between the metal middle frame and the bottom shell 310.

[0103] In addition, if the thickness of the metal middle frame used to form the second conductive medium 332 is relatively thin, the provision of the middle frame inner layer 321 can support the metal middle frame, thereby improving the reliability of the metal middle frame and ensuring the normal operation of the antenna.

[0104] Optionally, the material of the middle frame inner layer 321 may include polycarbonate (PC), acrylonitrile butadiene styrene (ABS), glass fiber reinforced material (GF), polyamide (PA), etc. The middle frame inner layer 321 may be formed of a single material or a plurality of different insulating materials. In this embodiment, the specific material of the middle frame inner layer 321 is not limited.

[0105] It is worth noting that the material of the middle frame inner layer 321 may be the same as or different from the material of the bottom shell 310 , which is not limited in this embodiment.

[0106] Optionally, the metal middle frame may be connected to the outer side surface of the middle frame inner layer 321 by gluing.

[0107] Alternatively, the metal middle frame may be formed on the outer side of the middle frame inner layer 321 by processes such as electroplating, Print Direct Structuring (PDS), and Laser Direct Structuring (LDS), which is not limited in this embodiment.

[0108] It is understandable that the shape of the annular structure of the middle frame inner layer 321 should be the same as the annular structure of the metal middle frame. The specific configuration thereof can refer to the description of the metal middle frame and will not be repeated here.

[0109] In another implementation, when the housing 300 has an insulating middle frame, the second conductive medium 332 may include an antenna layer, and the antenna layer may be disposed on the insulating middle frame of the housing 300. In this case, the second conductive medium 332 may not be used as a middle frame structure, but may only be a thin antenna layer attached to the middle frame structure. In this way, not only can the insulating middle frame structure be used to support the second conductive medium 332, but also the second conductive medium 332 and the first conductive medium 331 can be easily isolated from each other.

[0110] Optionally, the antenna layer may be connected to the outer side surface of the middle frame structure by gluing.

[0111] Alternatively, the antenna layer may be formed on the outer side of the middle frame structure by electroplating, printed direct forming (PDS), laser direct forming (LDS), or other processes, which is not limited in this embodiment.

[0112] Please continue reading Figures 7 to 9 In one implementation, the bottom shell 310 has a first surface 311 facing away from the middle frame, and the first conductive medium 331 includes a metal layer 3311 attached to the first surface 311. Since the thickness of the metal layer 3311 is usually small, attaching it to the first surface 311 of the bottom shell 310 has little effect on the overall volume of the electronic device, and does not affect the structural setting inside the shell 300, which is easy to implement. At the same time, since the first surface 311 is the surface of the bottom shell 310 facing the external environment, there are fewer blocking structures outside the first surface 311. When the first conductive medium 331 is set on the first surface 311, the first conductive medium 331 can release electromagnetic wave signals toward the side facing away from the first surface 311, thereby helping to increase the clearance area of ​​the antenna and facilitating the improvement of the antenna efficiency.

[0113] In the first example, when the first surface 311 is a smooth curved surface, the metal layer 3311 can be printed on the first surface 311 by a Print Direct Structuring (PDS) process. During processing, a conductive paste can be applied to the first surface 311, and the conductive paste can be applied and printed in multiple layers to form a three-dimensional conductive circuit, and the metal layer 3311 can be formed by thermal curing.

[0114] It can be seen that the metal layer 3311 formed by the PDS process can be an antenna pattern formed on the first surface 311. The PDS process does not require improvement of the conductive paste, and the process cost is low. The thickness of the first conductive medium 331 formed by PDS can be 0.005mm to 0.015mm, which is relatively small and not easily observed by the user, thereby maintaining a good appearance of the first surface 311.

[0115] The conductive paste may be silver paste, carbon paste, copper paste, gold paste, etc., which is not limited in this embodiment.

[0116] In the second example, the metal layer 3311 can be attached to the first surface 311 by laser direct structuring (LDS) process. During processing, metal powder can be arranged on the first surface 311, a laser beam can be focused on a specific position on the metal powder, and the metal powder can be melted or sintered layer by layer to form a solid structure. Through repeated operations, a stacked structure can be formed, thereby forming a three-dimensional conductive circuit.

[0117] In the third example, the metal layer 3311 can be attached to the first surface 311 by a two-color injection copper plating / nickel plating process. During processing, the bottom shell 310 structure is first injection molded, and then the first surface 311 of the bottom shell 310 is copper plated, and the copper plated layer is used to form a conductive circuit. The copper plated layer can then be nickel plated, so that the nickel plating can enhance the corrosion resistance of the parts, protect the copper plated layer, and obtain a good appearance effect.

[0118] In a fourth example, the metal layer 3311 can also be formed by embedding a metal film on the first surface 311. When the curvature of the first surface 311 is small, the metal film can be embedded on the first surface 311. If the curvature of the first surface 311 is slightly large, a metal film with a softer material can be selected for embedding.

[0119] The material of the metal film may be copper, silver, gold, magnesium-aluminum alloy, etc., which is not limited in this embodiment.

[0120] It is worth noting that, in order to facilitate the distinction of various structures in the housing 300, the first conductive medium 331 in the drawings provided in this embodiment has a relatively large structure thickness. In the actual production process, the thickness of the first conductive medium 331 formed by the above-mentioned various process methods is relatively small (approximately less than 0.1 mm), and the structure in the drawings of this embodiment is only a schematic diagram and does not represent the actual size and proportional relationship between the various structures.

[0121] In some embodiments, since the first surface 311 is a surface facing the external environment, in order to prevent the user from observing the first conductive medium 331 disposed on the first surface 311, post-processing operations such as painting or non-conductive vacuum metallization (NCVM) can be performed on the side of the first conductive medium 331 facing away from the first surface 311 to improve the appearance of the first conductive medium 331, thereby improving the aesthetics of the electronic device and improving the user experience.

[0122] In another implementation, the first conductive medium 331 may be disposed inside the bottom shell 310, such as embedded in the bottom shell 310. In this case, the first conductive medium 331 may be a sheet metal, a strip metal, an antenna layer, etc., which is not limited in this embodiment.

[0123] It is understandable that the first conductive medium 331 can be disposed on the outer surface of the bottom shell 310, such as the first surface 311. Alternatively, the first conductive medium 331 can be disposed inside the bottom shell 310, as long as an antenna slot can be provided between the first conductive medium 331 and the second conductive medium 332, which is not specifically limited in this embodiment.

[0124] Please continue reading Figures 7 to 9 In order to facilitate the realization of the functions of the electronic device, the bottom shell 310 also includes a device installation area 312, and the device installation area 312 is used to install sensor devices of the electronic device to facilitate the realization of functions such as heart rate monitoring of the electronic device.

[0125] Since the first conductive medium 331 usually has a certain shielding property, in order to prevent the first conductive medium 331 from affecting the detection signal of the sensor device, the first conductive medium 331 is arranged outside the device mounting area 312 of the first surface 311, thereby avoiding the sensor device.

[0126] Fig.11 A bottom view of the first bottom shell and the first conductive medium provided in this embodiment.

[0127] Fig.12 A bottom view of the second bottom shell and the first conductive medium provided in this embodiment.

[0128] like Fig.11 and Fig.12 As shown, optionally, the device mounting area 312 may be located in the middle of the first surface 311 , and the first conductive medium 331 is disposed at the periphery of the device mounting area 312 , so that the layout of the first conductive medium 331 can be easily realized.

[0129] in, Fig.11 and Fig.12 The shaded portion in the figure is the first conductive medium 331 , so as to distinguish the structure of the first conductive medium 331 from that of the bottom shell 310 .

[0130] like Fig.12 As shown, illustratively, the first conductive medium 331 can be disposed at positions on the first surface 311 where the device mounting area 312 is not disposed, so that the first conductive medium 331 with the largest possible area can be obtained, so as to increase the clearance area of ​​the antenna and thus improve the performance of the antenna.

[0131] Please refer again Figure 8 and Fig. 9 The middle frame and the bottom shell 310 are enclosed to form a receiving cavity 360, and the receiving cavity 360 is used to receive a circuit board 410. The circuit board 410 may be a mainboard of an electronic device, or may be an antenna circuit board 410, which is not limited in this embodiment.

[0132] It is understandable that the accommodating cavity 360 can also be used to accommodate structures such as batteries, display screens, wiring harnesses, and sensor devices of the electronic device, which will not be described in detail in this embodiment.

[0133] In order to realize the normal function of the antenna 330, it is usually necessary to electrically couple the antenna 330 with the antenna feeding point and the antenna feeding point in the electronic device. In the electronic device, the antenna feeding point and / or the antenna feeding point can be set on the circuit board 410. In this way, the first conductive medium 331 and the second conductive medium 332 can be electrically coupled to the circuit board 410 to realize the connection with its antenna feeding point and / or the antenna feeding point.

[0134] Exemplarily, the second conductive medium 332 is electrically coupled to the circuit board 410. The specific coupling method may include connecting the second conductive medium 332 and the circuit board 410 using a conductive wire, connecting the second conductive medium 332 and the circuit board 410 by welding, connecting the second conductive medium 332 and the circuit board 410 using a back-to-back (BTB) connector or a metal spring, etc., which is not limited in this embodiment.

[0135] Fig.13 for Figure 8 Enlarged view of part B in .

[0136] Please combine Figure 8 , Fig. 9 as well as Fig.13 In some embodiments, the bottom shell 310 is provided with a through hole 313, and the through hole 313 runs through the bottom shell 310 in the thickness direction (such as Fig. 9 The through hole 313 is filled with conductive paste, and when the conductive paste solidifies in the through hole 313, a first conductive portion 370 is formed. One end of the first conductive portion 370 is connected to the first conductive medium 331, and the other end is electrically coupled to the circuit board 410. It can be seen that by setting the first conductive portion 370 that runs through the thickness direction of the bottom shell 310, the first conductive medium 331 and the circuit board 410 that are set on both sides of the bottom shell 310 along the z-axis direction are electrically connected, so as to realize the connection between the first conductive medium 331 and the antenna feed point.

[0137] The conductive paste may be silver paste, carbon paste, copper paste, gold paste, etc., which is not limited in this embodiment.

[0138] Optionally, the through hole 313 includes a first hole segment 3131 and a second hole segment 3132 which are arranged in sequence from the first conductive medium 331 to the circuit board 410 and are interconnected. Among them, the aperture of the first hole segment 3131 is smaller than the aperture of the second hole segment 3132. It can be seen that the aperture of the first hole segment 3131 close to the first conductive medium 331 is relatively small. In this way, it is possible to prevent external dust, water vapor, etc. from entering the interior of the housing 300 through the first hole segment 3131 to protect the internal structure. At the same time, the aperture of the second hole segment 3132 close to the circuit board 410 is relatively large. In this way, the connection area of ​​the first conductive part 370 for electrical coupling with the circuit board 410 can be increased, thereby facilitating the electrical coupling of the first conductive part 370 with the circuit board 410.

[0139] Exemplarily, the number of the first conductive parts 370 can be one or more, such as 2, 3, 6, etc. The specific number can be selected according to actual conditions and is not limited in this embodiment.

[0140] It is worth noting that the first conductive parts 370 are formed by pouring conductive paste into the through holes 313 , and the number of the first conductive parts 370 is consistent with the number of the through holes 313 , and the number of the through holes 313 is not described again here.

[0141] Please combine Figure 8 , Fig. 9 as well as Fig.13 In one implementation, the bottom shell 310 has a second surface 314 opposite to the first surface 311, and a third conductive medium 380 is disposed on the second surface 314. The side of the third conductive medium 380 facing the second surface 314 is connected to the first conductive portion 370, and the side of the third conductive medium 380 facing away from the second surface 314 is electrically coupled to the circuit board 410. In this way, the third conductive medium 380 can be disposed inside the housing 300 to achieve electrical coupling with the circuit board 410 by using the third conductive medium 380.

[0142] In one example, the third conductive medium 380 includes a metal sheet 381 , and the metal sheet 381 is attached to the second surface 314 by in-mold decoration (IMD) technology. The metal sheet 381 has a third surface 3811 facing the circuit board 410 .

[0143] The second conductive medium 332 has a first end surface 3321 facing the third surface 3811 .

[0144] The third surface 3811 is parallel to the first end surface 3321, so that the first conductive medium 331 can be arranged in parallel with the first end surface 3321 of the second conductive medium 332 through the metal sheet 381, thereby forming a parallel electromagnetic field between the third surface 3811 and the first end surface 3321. In this way, the antenna can achieve better impedance matching and improve the performance of the antenna. At the same time, the electromagnetic field coupling effect between the metal sheet 381 and the second conductive medium 332 can be made stronger, which helps to improve the radiation efficiency and power transmission of the antenna.

[0145] In another example, when the second surface 314 is relatively flat and the second surface 314 can be relatively parallel to the first end surface 3321, the third conductive medium 380 includes an antenna layer formed by a print direct molding (PDS) process. In this way, the antenna layer disposed on the second surface 314 can be parallel to the first end surface 3321, thereby forming a relatively parallel electromagnetic field between the antenna layer and the first end surface 3321, so as to facilitate the connection between the third conductive medium 380 and the second surface 314, while improving the radiation efficiency and power transmission of the antenna.

[0146] Fig.14 A cross-sectional view of a third type of shell provided in this embodiment.

[0147] Fig.15 for Fig.14 Enlarged view of part C.

[0148] like Fig.14 and Fig.15 As shown, in another example, the third conductive medium 380 may further include a conductive adhesive 382, ​​and the conductive adhesive 382 is disposed corresponding to the first conductive portion 370. In this way, the conductive adhesive 382 can be used to increase the connection area of ​​the first conductive portion 370 for electrical coupling with the circuit board 410, so as to improve the electrical connection reliability between the first conductive portion 370 and the circuit board 410.

[0149] Optionally, the conductive backing glue 382 may include carbon glue, silver glue, conductive adhesive film, copper foil glue, etc., which is not limited in this embodiment.

[0150] Please refer again Fig.13 In order to facilitate the electrical connection between the third conductive medium 380 and the circuit board 410 , a connecting member 390 is also included.

[0151] The connector 390 is disposed on the circuit board 410 and is electrically connected to the circuit board 410 and the third conductive medium 380 , thereby achieving electrical connection between the third conductive medium 380 and the circuit board 410 .

[0152] Optionally, the connector 390 may include a metal spring, with one deformable end of the metal spring facing the third conductive medium 380, so that when the circuit board 410 is installed in the accommodating cavity 360, the metal spring can be used to make up the distance between the circuit board 410 and the third conductive medium 380, thereby facilitating the electrical connection between the circuit board 410 and the third conductive medium 380. At the same time, the elastic deformation of the metal spring can improve the stability of the electrical connection with the third conductive medium 380.

[0153] Alternatively, the connector 390 may also include any one of a spring pin, a back-to-back BTB connector, a conductive wire, a conductive foam, etc., which is not limited in this embodiment.

[0154] Fig.16 A schematic structural diagram of an electronic device provided in this embodiment from a viewing angle.

[0155] Fig.17 A schematic structural diagram of an electronic device provided by this embodiment from another perspective.

[0156] See also Fig.16 and Fig.17 This embodiment also provides an electronic device, including a display screen 420 and the above-mentioned housing.

[0157] The display screen 420 is disposed on a side of the middle frame 320 away from the bottom shell 310 , and is enclosed together with the middle frame 320 and the bottom shell 310 to form a receiving cavity.

[0158] The first conductive medium 331 and the second conductive medium 332 are electrically coupled to an antenna feed point on the electronic device 400 .

[0159] The electronic device provided in this embodiment can improve the performance of the antenna while facilitating miniaturization, and can also reduce the connection gap, reduce the difficulty of waterproof and dustproof design, improve the product appearance, and provide users with a better use experience.

[0160] The electronic device 400 may further include a circuit board 410 , which is disposed in the receiving cavity. An antenna feed point is disposed on the circuit board 410 , and the first conductive medium 331 and the second conductive medium 332 are electrically coupled to the antenna feed point on the circuit board 410 .

[0161] The electronic device 400 may further include a sensor device 430 , which is disposed in the device mounting area 312 of the bottom housing 310 , and the first conductive medium 331 is disposed outside the device mounting area 312 . The sensor device 430 may be used to detect the health status of the user in real time.

[0162] like Fig.17As shown, when the electronic device is a smart watch, the electronic device may further include a watch strap 440. The watch strap 440 is used to wear the electronic device 400 on the user's wrist.

[0163] It is understandable that when the electronic device 400 is other wearable devices, the electronic device 400 may also include straps at other locations, such as a head strap, a chest strap, etc., so as to wear the electronic device 400 at different locations.

[0164] It is worth noting that if the electronic device is a mobile phone, its housing and the entire structure may be a square structure, and the specific type of the electronic device is not limited in this embodiment.

[0165] It should be noted that those skilled in the art will easily think of other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application. The specification and examples are only regarded as exemplary, and the true scope of the present application is indicated by the claims.

[0166] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A housing (300), characterized in that: Applied to electronic equipment, the housing (300) comprises: A bottom shell (310), wherein the main body material of the bottom shell (310) is an insulating material; A middle frame (320), the middle frame (320) being connected to the bottom shell (310); An antenna (330), the antenna (330) comprising a first conductive medium (331) and a second conductive medium (332); The first conductive medium (331) is disposed on the bottom shell (310); The second conductive medium (332) is arranged on the middle frame (320); The first conductive medium (331) and the second conductive medium (332) are electrically coupled to an antenna feed point of the electronic device; The connection between the bottom shell (310) and the middle frame (320) is insulated to form an antenna slot at the connection.

2. The housing (300) according to claim 1, characterized in that: The bottom shell (310) has a first surface (311) facing away from the middle frame (320); The first conductive medium (331) includes a metal layer (3311) attached to the first surface (311).

3. The housing (300) according to claim 1 or 2, characterized in that: The middle frame (320) comprises a metal middle frame, and the metal middle frame forms the second conductive medium (332); The metal middle frame is an annular structure formed around the edge of the bottom shell (310).

4. The housing (300) according to claim 3, characterized in that: Also includes: The middle frame inner layer (321) is an annular structure attached to the inner side of the metal middle frame, and the material of the middle frame inner layer (321) is an insulating material.

5. The housing (300) according to claim 2, characterized in that: The metal middle frame and the bottom shell (310) are enclosed to form a receiving cavity (360), and the receiving cavity (360) is used to receive a circuit board (410); The antenna feed point is located on the circuit board (410).

6. The housing (300) according to claim 5, characterized in that: The second conductive medium (332) is electrically coupled to the circuit board (410); The bottom shell (310) is provided with a through hole (313), and a conductive paste is poured into the through hole (313) to form a first conductive part (370); One end of the first conductive part (370) is connected to the first conductive medium (331), and the other end is electrically coupled to the circuit board (410).

7. The housing (300) according to claim 6, characterized in that: The through hole (313) comprises a first hole section (3131) and a second hole section (3132) which are sequentially arranged from the first conductive medium (331) to the circuit board (410) and are interconnected; The aperture of the first hole section (3131) is smaller than the aperture of the second hole section (3132).

8. The housing (300) according to claim 6, characterized in that: The bottom shell (310) has a second surface (314) opposite to the first surface (311); The second surface (314) is also provided with a third conductive medium (380), the side of the third conductive medium (380) facing the second surface (314) is connected to the first conductive portion (370), and the side of the third conductive medium (380) facing away from the second surface (314) is electrically coupled to the circuit board (410).

9. The housing (300) according to claim 8, characterized in that: The third conductive medium (380) comprises a metal sheet (381), the metal sheet (381) is bonded to the second surface (314) by in-mold bonding technology (IMD), and the metal sheet (381) has a third surface (3811) facing the circuit board; The second conductive medium (332) has a first end surface (3321) facing the third surface (3811); The third surface (3811) is parallel to the first end surface (3321) so as to form a parallel electromagnetic field between the third surface (3811) and the first end surface (3321).

10. The housing (300) according to claim 8, characterized in that: The third conductive medium (380) includes an antenna layer formed by a printing direct molding (PDS) process; The second conductive medium (332) has a first end surface (3321) facing the second surface (314); The second surface (314) is parallel to the first end surface (3321), so that the antenna layer is parallel to the first end surface (3321), and a parallel electromagnetic field is formed between the antenna layer and the first end surface (3321).

11. The housing (300) according to claim 8, characterized in that: The third conductive medium (380) includes a conductive adhesive (382), and the conductive adhesive (382) is arranged corresponding to the first conductive part (370).

12. The housing (300) according to claim 8, characterized in that: Also includes: A connecting member (390) is arranged on the circuit board (410); The connecting member (390) is electrically connected to the circuit board (410) and the third conductive medium (380).

13. The housing (300) according to claim 12, characterized in that: The connecting piece (390) includes but is not limited to any one of a metal spring, a spring pin, a back-to-back BTB connector, and a conductive foam.

14. The housing (300) according to claim 2, characterized in that: The bottom shell (310) comprises a device installation area (312), and the device installation area (312) is used to install a sensor device of the electronic device; The first conductive medium (331) is arranged at a position outside the device mounting area (312).

15. The housing (300) according to claim 14, characterized in that: The device mounting area (312) is located in the middle of the first surface (311), and the first conductive medium (331) is arranged on the periphery of the device mounting area (312).

16. The housing (300) according to claim 2, characterized in that: The metal layer (3311) is printed on the first surface (311) by a printing direct molding (PDS) process; Alternatively, the metal layer (3311) is attached to the first surface (311) by a laser direct structuring (LDS) process; Alternatively, the metal layer (3311) is attached to the first surface (311) by a two-color injection copper plating / nickel plating process; Alternatively, the metal layer (3311) is formed by embedding a metal film on the first surface (311).

17. An electronic device, characterized in that: comprising a display screen (420) and a housing (300) as claimed in any one of claims 1 to 16; The display screen (420) is arranged on a side of the middle frame (320) away from the bottom shell (310); The display screen (420), the middle frame (320) and the bottom shell (310) are jointly enclosed to form a receiving cavity (360); The first conductive medium (331) and the second conductive medium (332) are electrically coupled to an antenna feed point on the electronic device.

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