Electronic device

Abstract

The application discloses an electronic device and belongs to the technical field of electronic products. The electronic device comprises a frame, a flexible circuit board and a control circuit board. The frame comprises a first metal arm and a second metal arm, and a strip-shaped groove is formed on the surface of the frame. The first metal arm and the second metal arm are arranged at intervals, and the strip-shaped groove is arranged between the first metal arm and the second metal arm. The flexible circuit board comprises a first connecting part and a second connecting part. The first connecting part is electrically connected with the control circuit board, and the second connecting part is inserted into the inside of the strip-shaped groove. A first windowing area and a second windowing area are formed on the first end face of the second connecting part. The first end face is the end face of the second connecting part facing the first inner wall of the strip-shaped groove. The first inner wall comprises a first coupling area located on the first metal arm and a second coupling area located on the second metal arm. There is a gap between the first end face and the first inner wall, so that the first windowing area is coupled with the first coupling area, and the second windowing area is coupled with the second coupling area.

Description

Technical Field

[0001] This application relates to the field of electronic product technology, specifically to an electronic device. Background Technology

[0002] With the development of electronic devices, the trend has towards thinner and smaller devices. Reducing the overall thickness of electronic devices often involves compressing the size of the battery compartment, resulting in a decrease in battery capacity. To alleviate this problem, one proposed technology replaces the rigid antenna circuit board assembled in the XY plane near the battery with a flexible printed circuit board (FPC). One side of the FPC has a surface mount technology (SMT) spring, which is embedded in the gap between the antenna arm and the battery to achieve electrical connection between the antenna arm and the FPC. This improved solution only requires space for the SMT spring, compared to reserving mounting space for a rigid antenna circuit board on the battery plane, thus increasing the battery mounting space for a larger capacity battery. However, even with this improvement, the problem of insufficient battery capacity in electronic devices still exists. Summary of the Invention

[0003] This application provides an electronic device that can alleviate the problem of insufficient battery capacity in electronic devices.

[0004] To solve the above-mentioned technical problems, this application provides an electronic device, including: a frame, a flexible circuit board and a control circuit board. The frame includes a first metal arm and a second metal arm, and a strip groove is formed on the surface of the frame. The first metal arm and the second metal arm are spaced apart, and the strip groove spans between the first metal arm and the second metal arm.

[0005] The flexible circuit board includes a first connecting portion and a second connecting portion. The first connecting portion is electrically connected to the control circuit board, and the second connecting portion is inserted into the interior of the strip groove. The first end face of the second connecting portion has a first window area and a second window area. The first window area and the second window area are areas that expose the conductive layer inside the flexible circuit board. The first end face is the end face of the second connecting portion facing the first inner wall of the strip groove. The first inner wall includes a first coupling area located in the first metal arm and a second coupling area located in the second metal arm. There is a gap between the first end face and the first inner wall so that the first window area is coupled to the first coupling area and the second window area is coupled to the second coupling area.

[0006] The second metal arm is grounded, and the flexible circuit board, the first metal arm, and the second metal arm form an oscillating antenna working circuit.

[0007] In this embodiment, a strip-shaped groove is formed on the surface of the frame, and the second end of the flexible circuit board is inserted into the strip-shaped groove. This couples the two open areas of the flexible circuit board with the corresponding areas of the first inner wall of the strip-shaped groove, thereby achieving an electrical connection between the metal arm and the flexible circuit board. Compared to related technologies, this eliminates the need for a gap between the metal arm and the battery for mounting SMT springs. The battery can extend to be flush with the metal arm, allowing for a larger battery installation space and thus enabling the use of larger capacity batteries to further alleviate the problem of insufficient battery capacity in electronic devices. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the internal structure of the electronic device in an embodiment of this application;

[0009] Figure 2 This is one of the partial schematic diagrams of the connection between the second connection portion of the flexible circuit board and the frame in an embodiment of this application;

[0010] Figure 3 This is a second partial schematic diagram of the connection between the second connection portion of the flexible circuit board and the frame in an embodiment of this application;

[0011] Figure 4 This is one of the structural schematic diagrams of the flexible circuit board in the embodiments of this application;

[0012] Figure 5 This is the second schematic diagram of the flexible circuit board in the embodiments of this application.

[0013] Explanation of reference numerals in the attached figures:

[0014] 100 Frame, 110 First metal arm, 120 Second metal arm, 130 Strip groove, 140 Insulating filler, 150 Nano injection molded part, 200 Flexible circuit board, 210 First connecting part, 220 Second connecting part, 221 First window opening area, 222 Second window opening area, 300 Control circuit board, 400 Battery, 500 Adhesive sheet, 600 Insulating support sheet, A First coupling area, B Second coupling area. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0016] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0017] The following description, in conjunction with the accompanying drawings, details an electronic device provided in this application through specific embodiments and application scenarios.

[0018] Please see Figure 1-5 , Figure 1-5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device includes: a frame 100, a flexible circuit board 200, and a control circuit board 300. The frame 100 includes a first metal arm 110 and a second metal arm 120, and a strip groove 130 is formed on the surface of the frame 100. The first metal arm 110 and the second metal arm 120 are spaced apart, and the strip groove 130 spans between the first metal arm 110 and the second metal arm 120.

[0019] The flexible circuit board 200 includes a first connecting portion 210 and a second connecting portion 220. The first connecting portion 210 is electrically connected to the control circuit board 300, and the second connecting portion 220 is inserted into the interior of the strip groove 130. The first end face of the second connecting portion 220 has a first window area 221 and a second window area 222. The first window area 221 and the second window area 222 are areas that expose the conductive layer inside the flexible circuit board 200. The first end face is the end face of the second connecting portion 220 facing the first inner wall of the strip groove 130. The first inner wall includes a first coupling area located in the first metal arm 110 and a second coupling area located in the second metal arm 120. There is a gap between the first end face and the first inner wall so that the first window area 221 is coupled to the first coupling area, and the second window area 222 is coupled to the second coupling area.

[0020] The second metal arm 120 is grounded, and the flexible circuit board 200, the first metal arm 110 and the second metal arm 120 form an oscillating antenna working circuit.

[0021] The first metal arm 110 and the second metal arm 120 mentioned above can be two adjacent metal arms on the frame 100. For example, the first metal arm 110 and the second metal arm 120 can be two adjacent metal arms in the length direction of the frame 100, or the first metal arm 110 and the second metal arm 120 can also be two adjacent metal arms in the width direction of the frame 100.

[0022] Please see Figure 1-2 The first metal arm 110 and the second metal arm 120 are two adjacent metal arms along the length of the frame 100, and are disposed between the first metal arm 110 and the second metal arm 120. The length direction of the strip groove 130 is the same as that of the first metal arm 110 and the second metal arm 120. The strip groove 130 spanning between the first metal arm 110 and the second metal arm 120 means that the strip groove 130 is disposed on the side of the first metal arm 110 and the second metal arm 120, and is adjacent to the first metal arm 110 and the second metal arm 120 respectively. One end of the strip groove 130 is located on the first metal arm 110, and the other end of the strip groove 130 is located on the second metal arm 120. The strip groove 130 spans the interval area between the first metal arm 110 and the second metal arm 120.

[0023] The control circuit board 300 can be any type of circuit board in an electronic device, such as the main control circuit board. The first metal arm 110 can be electrically connected to the control circuit board 300 through the flexible circuit board 200. In this way, the control circuit board 300 can transmit a power supply signal to the first metal arm 110 through the flexible circuit board 200 to realize signal transmission based on the oscillating antenna.

[0024] The aforementioned first window area 221 and second window area 222 can be achieved by hollowing out the coating on the surface of the conductive layer, so that the conductive layer in the flexible circuit board 200 is exposed to the outside at the first window area 221 and the second window area 222. The conductive layer can be a conductive layer in various scenarios within the flexible circuit board 200; for example, the conductive layer can be a copper layer. In this case, the first window area 221 and the second window area 222 serve as copper-exposed windows of the flexible circuit board 200.

[0025] The first connection portion 210 of the aforementioned flexible circuit board 200 can be electrically connected to the control circuit board 300 via a board-to-board (BTB) connector.

[0026] The first coupling region can be disposed opposite to the first window opening region 221, and a gap exists between the first coupling region and the first window opening region 221 to achieve coupling between the first window opening region 221 and the first coupling region. Correspondingly, the second coupling region can be disposed opposite to the second window opening region 222, and a gap exists between the second coupling region and the second window opening region 222 to achieve coupling between the second window opening region 222 and the second coupling region. For details, please refer to... Figure 2-3 The first coupling region is coupled to the first window region 221 to form a first coupling region A, and the second coupling region is coupled to the second window region 222 to form a second coupling region B.

[0027] The aforementioned electronic device can be of various types, such as mobile phones and tablets. In some embodiments of this application, the electronic device can be a foldable screen electronic device. Since the primary demand of consumers for foldable screen electronic devices is a thin and light design, various types of foldable screen electronic devices utilize a series of innovative technologies to meet this primary demand and enhance product competitiveness. However, thinning the overall device inevitably reduces the capacity of the battery 400, i.e., the Z-axis dimension of the battery 400 is reduced. Based on this, in this embodiment, by eliminating the SMT spring mounting space in the X-axis direction of the battery 400, the original SMT spring mounting space can be used as the mounting space for the battery 400, thereby increasing the size of the battery 400 in the X-axis direction and avoiding excessive capacity loss due to overall device thinning. Here, the Z-axis can be the thickness direction of the battery 400, and the X-axis can be the width direction of the battery 400.

[0028] Furthermore, the use of SMT spring contacts to achieve electrical connection between the antenna arm and the FPC in related technologies has the following drawbacks: Because the flexible circuit board 200 is assembled vertically, the SMT spring contacts on the flexible circuit board 200 are prone to scratches during assembly and manufacturing, leading to deformation and component loss. In related technologies, to maintain low resistance and long-term reliability at the contact point between the frame 100 and the SMT spring contacts, a gold-plated sheet needs to be placed in the contact area between the frame 100 and the SMT spring contacts. However, the gold-plated sheet typically requires a stacking space of 0.10mm in the X direction. The overall path of the SMT spring contacts is long, especially for large spring contacts, which increases the inductive reactance of the entire circuit and affects the radiation efficiency of the antenna.

[0029] In this embodiment, since the SMT spring can be eliminated, the problem of the SMT spring being prone to scratches and deformation during assembly and manufacturing, which is caused by the need to place it on the flexible circuit board 200, can be avoided. Simultaneously, the gold-plated sheet can be eliminated, further increasing the installation space of the battery 400. Furthermore, eliminating the SMT spring avoids the problem of increased inductive reactance of the entire circuit and reduced antenna radiation efficiency caused by its presence. In addition, the entire coupling design assembly consists of only two components: the flexible circuit board 200 and the frame 100. The motherboard is not required for coupling, thus avoiding the problem of large fluctuations in coupling gap caused by complex motherboard assembly and manufacturing.

[0030] It should be noted that, in related technologies, an SMT spring and a gold-plated sheet connected to the SMT spring are required on the surface of the frame 100. The SMT spring requires 0.60mm of stacking space in the X direction of the battery 400, and the gold-plated sheet requires 0.10mm of stacking space in the X direction of the battery 400. That is, in related technologies, using an SMT spring to achieve electrical connection between the antenna arm and the FPC requires a 0.70mm gap between the frame 100 and the battery 400. However, in this embodiment, since an SMT spring is not required to achieve electrical connection between the antenna arm and the FPC, 0.70mm of stacking space can be saved in the X direction of the battery 400. The saved stacking space can be used as the installation space for the battery 400, which is beneficial for setting a larger battery 400 and increasing the capacity of the battery 400.

[0031] It is understood that, since the second connecting part 220 is inserted into the strip groove 130 of the frame 100 in this embodiment, the second connecting part 220 will not occupy the stacking space of the battery in the 400X direction.

[0032] The first metal arm 110 can form the radiator of the oscillating antenna, and the second metal arm 120 can form the main ground of the oscillating antenna. The working principle of the oscillating antenna is as follows: when the control circuit board 300 inputs an AC feed signal to the flexible circuit board 200, the AC feed signal is transmitted through the conductive layer to the first window region 221, and coupled from the first window region 221 to the first metal arm 110. The AC feed signal flowing through the first metal arm 110 is coupled from the first coupling region to the first window region 221, and the AC feed signal coupled to the first window region 221 is transmitted through the conductive layer to the second window region 222, and coupled from the second window region 222 to the second metal arm 120, thereby forming the oscillating antenna working circuit. When the AC feed signal flows through the first metal arm 110, it radiates outwards.

[0033] In this embodiment, a strip groove 130 is formed on the surface of the frame 100, and the second end of the flexible circuit board 200 is inserted into the strip groove 130. This couples the two open areas of the flexible circuit board 200 with the corresponding areas of the first inner wall of the strip groove 130, thereby achieving an electrical connection between the metal arm and the flexible circuit board 200. Thus, compared to solutions in related technologies, there is no need to provide a gap between the metal arm and the battery 400 for mounting springs. The battery 400 can extend to be flush with the metal arm, which allows for a larger installation space for the battery 400, enabling the use of a larger capacity battery 400 to further alleviate the problem of insufficient battery capacity in electronic devices.

[0034] Optionally, the flexible circuit board 200 includes a base film layer, a conductive layer and a solder resist layer stacked sequentially. The solder resist layer has a first opening and a second opening in the region of the second connection portion 220 to form the first window area 221 and the second window area 222.

[0035] Specifically, by providing a first opening and a second opening to the solder resist layer on the surface of the second connection portion 220, the conductive layer opposite to the first opening is exposed to the outside, thereby forming a first window area 221, and at the same time, the conductive layer opposite to the second opening is exposed to the outside, thereby forming a second window area 222.

[0036] In this embodiment, by providing a first opening and a second opening in the region of the solder resist layer located in the second connection portion 220, the first window region 221 and the second window region 222 can be formed.

[0037] Optionally, the flexible circuit board 200 further includes an insulating support sheet 600, which is attached to the second end face of the second connecting portion 220, wherein the first end face and the second end face are two opposite end faces of the second connecting portion 220.

[0038] The insulating support sheet 600 can be any insulating sheet with supporting properties, such as a PET sheet. The insulating support sheet 600 can be adhered to the second end face of the second connecting portion 220. Specifically, the insulating sheet can be a PET sheet with adhesive on one side, thus allowing adhesion between the adhesive side of the PET sheet and the second end face of the second connecting portion 220. The thickness of the PET sheet can be 0.10 mm.

[0039] Please see Figure 5The shape of the insulating support sheet 600 may be the same as that of the second connecting portion 220 to cover the entire second end face of the second connecting portion 220, wherein the other areas of the flexible circuit board 200, except for the second connecting portion 220, are not covered by the insulating support sheet 600.

[0040] In this embodiment, by providing an insulating support piece 600 on the second end face of the second connecting part 220, the insulating support piece 600 can support the second connecting part 220, preventing wrinkles and warping due to improper assembly of the second support part, which could lead to unintentional overlap between the first window area 221 and the second window area 222 and the frame 100.

[0041] Optionally, the first end face is bonded to the first inner wall by an adhesive sheet 500, and the width of the gap between the first end face and the first inner wall is equal to the thickness of the adhesive sheet 500.

[0042] The adhesive sheet 500 may be double-sided adhesive. It is understood that the adhesive sheet 500 is disposed in areas of the first end face other than the first window area 221 and the second window area 222.

[0043] Specifically, by using double-sided adhesive to bond the first end face to the first inner wall, and simultaneously bonding a PET sheet to one side of the second end face, the coupling gap between the coupling surface of the FPC and the coupling surface of the frame 100 can be ensured to be stable. The coupling gap is no longer affected by the loosening of screws during experiments or use, thus ensuring the long-term reliability of antenna performance.

[0044] The number of adhesive pieces 500 can be set according to actual needs. For example, there can be more than one adhesive piece 500. When the number of adhesive pieces 500 is 1, the outline shape of the adhesive piece 500 can be the same as the outline shape of the first end face. The adhesive piece 500 has through holes in the area opposite to the first window area 221 and the second window area 222 so that the window area can be coupled with the corresponding coupling area.

[0045] In this embodiment, by bonding the first end face to the first inner wall with the adhesive sheet 500, the stability of the connection between the flexible circuit board 200 and the frame 100 can be improved. At the same time, a gap can be formed between the first window area 221 and the first coupling area, and a gap can be formed between the second window area 222 and the second coupling area, so as to achieve coupling between the first window area 221 and the first coupling area, and coupling between the second window area 222 and the second coupling area.

[0046] Optionally, the first end face is bonded to the first inner wall by at least three adhesive pieces 500, and the at least three adhesive pieces 500, the first window area 221 and the second window area 222 are arranged at intervals along the length direction of the second connecting portion 220.

[0047] Specifically, in some embodiments of this application, the number of adhesive pieces 500 can be three or more, and each adhesive piece 500 is disposed in other areas of the first end face besides the first window area 221 and the second window area 222. For example, please refer to... Figure 4 The number of adhesive pieces 500 is three, and the distribution of the three adhesive pieces 500 is as follows: an adhesive piece 500 is provided between the first window area 221 and the second window area 222, an adhesive piece 500 is provided on the side of the first window area 221 away from the second window area 222, and an adhesive piece 500 is provided on the side of the second window area 222 away from the first window area 221.

[0048] For example, in some other embodiments of this application, the number of adhesive pieces 500 can be five, wherein the five adhesive pieces 500, the first window area 221 and the second window area 222 are arranged at intervals along the length direction of the second connecting portion 220. The distribution positions of the five adhesive pieces 500 are as follows: an adhesive piece 500 is provided between the first window area 221 and the second window area 222, two adhesive pieces 500 are provided on the side of the first window area 221 away from the second window area 222, and two adhesive pieces 500 are provided on the side of the second window area 222 away from the first window area 221.

[0049] For example, in some other embodiments of this application, the number of adhesive pieces 500 can be six, wherein the six adhesive pieces 500, the first window area 221 and the second window area 222 are arranged at intervals along the length direction of the second connecting portion 220. The specific distribution positions of the six adhesive pieces 500 are as follows: two adhesive pieces 500 are provided between the first window area 221 and the second window area 222, two adhesive pieces 500 are provided on the side of the first window area 221 away from the second window area 222, and two adhesive pieces 500 are provided on the side of the second window area 222 away from the first window area 221.

[0050] In this embodiment, by arranging the at least three adhesive pieces 500, the first window area 221, and the second window area 222 at intervals along the length of the second connecting portion 220, the stability of the connection between the flexible circuit board 200 and the frame 100 can be improved. At the same time, it can be ensured that the gap between the first end face and the first inner wall tends to be equal at each position.

[0051] Optionally, the strip 130 is formed on the end face of the frame 100 facing the display screen.

[0052] In this embodiment, by opening the strip groove 130 on the end face of the frame 100 facing the display screen, that is, the plane where the opening of the strip groove 130 is located can be flush with the plane where the opening of the battery compartment is located, thus, as Figure 1 As shown, the flexible circuit board 200 can extend directly from the control circuit board 300 along the plane where the opening of the battery compartment is located to the slot of the strip groove 130 and be inserted into the strip groove 130, which helps to simplify the wiring of the flexible circuit board 200.

[0053] Optionally, the first metal arm 110 and the second metal arm 120 are spaced apart, and the frame 100 includes an insulating filler 140 located between the first metal arm 110 and the second metal arm 120.

[0054] It is understood that the insulating filler 140 forms a break in the frame 100.

[0055] In this embodiment, by spacing the first metal arm 110 and the second metal arm 120 apart, and providing an insulating filler 140 between the first metal arm 110 and the second metal arm 120, the radiator of the oscillating antenna can be relatively isolated from the main ground.

[0056] Optionally, the strip groove 130 further includes a second inner wall opposite to the first inner wall, and the distance between the first inner wall and the second inner wall is 0.50 mm.

[0057] In this embodiment, by setting the distance between the first inner wall and the second inner wall to 0.50 mm, the second connecting part 220 can be installed, while avoiding the strip groove 130 from being too large.

[0058] Optionally, the gap width between the first end face and the first inner wall is 0.1 mm.

[0059] In this embodiment, by making the gap width between the first end face and the first inner wall 0.1mm, it can be ensured that there is a good coupling effect between the first window area 221 and the first coupling area, and that there is a good coupling effect between the second window area 222 and the second coupling area.

[0060] Optionally, the electronic device further includes a battery 400, the frame 100 has a battery compartment, the first metal arm 110 and the second metal arm 120 form the compartment wall of the battery compartment, and the battery 400 is embedded in the battery compartment.

[0061] In this embodiment, since the first metal arm 110 and the second metal arm 120 form the wall of the battery compartment, that is, the battery 400 can extend to the first metal arm 110 and the second metal arm 120, compared with the related technology, since the battery 400 occupies the installation space of the SMT spring in the related technology, the size of the battery 400 in the X direction is increased, thereby increasing the capacity of the battery 400.

[0062] Please see Figure 2-3 In some embodiments of this application, the frame 100 includes a metal body and a nano-injection molded part 150 fixedly connected to the metal body. The metal body includes the first metal arm 110 and the second metal arm 120. The strip groove 130 is formed between the metal body and the nano-injection molded part 150. The strip groove 130 can be injection molded during the injection molding of the nano-injection molded part 150.

[0063] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An electronic device, characterized in that, include: The frame, flexible circuit board, and control circuit board are provided. The frame includes a first metal arm and a second metal arm, and a strip groove is formed on the surface of the frame. The first metal arm and the second metal arm are spaced apart, and the strip groove spans between the first metal arm and the second metal arm. The flexible circuit board includes a first connecting portion and a second connecting portion. The first connecting portion is electrically connected to the control circuit board, and the second connecting portion is inserted into the interior of the strip groove. The first end face of the second connecting portion has a first window area and a second window area. The first window area and the second window area are areas that expose the conductive layer inside the flexible circuit board. The first end face is the end face of the second connecting portion facing the first inner wall of the strip groove. The first inner wall includes a first coupling area located in the first metal arm and a second coupling area located in the second metal arm. There is a gap between the first end face and the first inner wall so that the first window area is coupled to the first coupling area and the second window area is coupled to the second coupling area. The second metal arm is grounded, and the flexible circuit board, the first metal arm, and the second metal arm form an oscillating antenna working circuit.

2. The electronic device according to claim 1, characterized in that, The flexible circuit board includes a base film layer, a conductive layer and a solder resist layer stacked in sequence. The solder resist layer has a first opening and a second opening in the region of the second connection portion to form the first window area and the second window area.

3. The electronic device according to claim 1, characterized in that, The flexible circuit board also includes an insulating support sheet, which is attached to the second end face of the second connecting portion. The first end face and the second end face are two opposite end faces of the second connecting portion.

4. The electronic device according to claim 1, characterized in that, The first end face is bonded to the first inner wall by an adhesive sheet, and the width of the gap between the first end face and the first inner wall is equal to the thickness of the adhesive sheet.

5. The electronic device according to claim 4, characterized in that, The first end face is bonded to the first inner wall by at least three adhesive pieces, and the at least three adhesive pieces, the first window area and the second window area are arranged at intervals along the length direction of the second connection portion.

6. The electronic device according to claim 1, characterized in that, When the control circuit board inputs an AC feed signal to the flexible circuit board, the AC feed signal is transmitted through the conductive layer to the first window area and coupled from the first window area to the first metal arm. The AC feed signal flowing through the first metal arm is coupled from the first coupling area to the first window area. The AC feed signal coupled to the first window area is transmitted through the conductive layer to the second window area and coupled from the second window area to the second metal arm to form an oscillating antenna operating circuit.

7. The electronic device according to claim 1, characterized in that, The strip is formed on the end face of the frame facing the display screen.

8. The electronic device according to claim 1, characterized in that, The first metal arm and the second metal arm are spaced apart, and the frame includes an insulating filler located between the first metal arm and the second metal arm.

9. The electronic device according to claim 1, characterized in that, The groove also includes a second inner wall opposite to the first inner wall, and the distance between the first inner wall and the second inner wall is 0.50 mm.

10. The electronic device according to claim 1, characterized in that, The electronic device also includes a battery, and the frame has a battery compartment. The first metal arm and the second metal arm form the compartment wall of the battery compartment, and the battery is embedded in the battery compartment.

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