Electronic device

Abstract

The utility model discloses electronic equipment, and belongs to the technical field of electronic products. The electronic equipment comprises a frame body and an antenna assembly, the frame body comprises a plastic part and a metal part, the plastic part is embedded in the metal part, the metal part is provided with a groove, and the antenna assembly is arranged in the groove; the antenna assembly comprises an antenna elastic piece and a flexible circuit board, the antenna elastic piece is arranged on the flexible circuit board, the groove comprises a first side wall and a second side wall which are opposite to each other, the antenna elastic piece is conducted with the first side wall through a first welding piece, and the flexible circuit board is connected with the second side wall.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic products, and specifically relates to an electronic device. Background Art

[0002] As electronic devices become more and more compatible with more functions, the number of devices in electronic devices continues to increase, which leads to increasingly crowded space inside electronic devices, thus limiting the space for batteries. In the overall device design process, the space design of almost every area has reached its limit.

[0003] like Figures 1 to 3 As shown, it shows an existing antenna assembly installation scheme, the metal part of the frame is designed to be L-shaped, the L-shaped double-row bottom solder gold-plated sheet 105 is welded to the metal frame through the bottom double-row solder points; the single-sided solder gold-plated sheet 106 (structure and Figure 7 The L-shaped double-row bottom-welded gold-plated sheet 105 has a large double-row solder joint at the bottom, which limits the installation space of the battery. In order to ensure the capacity and performance requirements of the battery, how to make more space for the battery has become a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an electronic device that can solve the technical problem of how to free up more space for batteries.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides an electronic device, including:

[0007] A frame and an antenna assembly, wherein the frame comprises a plastic part and a metal part, the plastic part is embedded in the metal part, the metal part is provided with a groove, and the antenna assembly is arranged in the groove;

[0008] The antenna assembly includes an antenna shrapnel and a flexible circuit board. The antenna shrapnel is arranged on the flexible circuit board. The groove includes a first side wall and a second side wall opposite to each other. The antenna shrapnel is connected to the first side wall through a first welding piece, and the flexible circuit board is connected to the second side wall.

[0009] In an embodiment of the present application, an electronic device includes: a frame and an antenna assembly, the frame includes a plastic part and a metal part, the plastic part is embedded in the metal part, the metal part is provided with a groove, and the antenna assembly is provided in the groove; the antenna assembly includes an antenna spring and a flexible circuit board, the antenna spring is provided on the flexible circuit board, the groove includes a first side wall and a second side wall opposite to each other, the antenna spring is connected to the first side wall through a first welding part, and the flexible circuit board is connected to the second side wall. In this way, by providing a groove in the metal part of the frame, the first welding part alone can be used to achieve a fixed connection of the antenna spring, getting rid of the use restriction of the L-shaped gold-plated sheet, avoiding the width occupation of the antenna small board mounting slot by the double-row welding points at the bottom of the L-shaped gold-plated sheet, and freeing up more installation space for the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A schematic diagram showing an internal cross-section of a conventional electronic device;

[0011] Figure 2 A schematic diagram showing the internal structure of an existing electronic device;

[0012] Figure 3 A schematic diagram showing the structure of an L-shaped double-row bottom solder gold-plated sheet;

[0013] Figure 4 A schematic diagram showing the structure of an L-shaped single-row bottom solder gold-plated sheet;

[0014] Figure 5 A schematic diagram showing an internal cross-section of an electronic device according to an embodiment of the present application;

[0015] Figure 6 A schematic diagram showing the internal structure of an electronic device according to an embodiment of the present application;

[0016] Figure 7 A schematic diagram showing the structure of a side-welded gold-plated sheet according to an embodiment of the present application;

[0017] Figure 8 A schematic diagram showing the structure of a groove in an embodiment of the present application;

[0018] Fig. 9 One of the schematic diagrams showing the installation of the antenna board and the fixing bracket according to the embodiment of the present application;

[0019] Fig.10 A second schematic diagram showing the installation of the antenna board and the fixing bracket according to an embodiment of the present application;

[0020] Fig.11 The third schematic diagram showing the installation of the antenna board and the fixing bracket according to the embodiment of the present application;

[0021] Fig.12 A fourth schematic diagram showing the installation of the antenna board and the fixing bracket according to an embodiment of the present application;

[0022] Fig.13 A schematic diagram showing the structure of a fixing bracket according to an embodiment of the present application.

[0023] Description of reference numerals:

[0024] 101-FPC of antenna assembly; 102-plastic bracket; 103-spring; 104-antenna device; 105-L-type double-row bottom solder gold-plated sheet; 106-single-sided solder gold-plated sheet; 107-L-type single-row bottom solder gold-plated sheet; 108-reinforcement plate; 1-metal part; 11-groove; 111-first side wall; 112-second side wall; 113-notch; 2-flexible circuit board; 21-antenna spring; 211-first feed spring; 212; second feed spring; 213-first ground feed spring; 214-second ground feed spring; 23-control chip; 3-fixed bracket; 31-recessed area; 32-hollow structure; 33-disassembly part; 34-clip; 4-first welding part; 5-reinforcement plate; 6-protective cover; 7-plastic part; 8-battery. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here. In addition, the "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0027] Before introducing the embodiments of the present application, Figures 1 to 4 The existing antenna assembly installation structure is introduced.

[0028] In order to realize the four low-frequency solution and improve the antenna performance, it is necessary to add an antenna component design on one side of the battery compartment. The corresponding positions of the antenna component's feed spring and ground spring need to be welded with gold-plated sheets. At the same time, the antenna spring needs to be connected to the FPC101 of the antenna component and reliably fixed to one side of the battery compartment through the reinforcement plate 108 and the plastic bracket 102. Since electronic devices have great requirements for battery capacity and performance, in order to meet this design without sacrificing other performance, the following must be met:

[0029] 1. Maintain competitive battery capacity, that is, the width of the battery compartment cannot be increased to reduce battery capacity in exchange for antenna performance.

[0030] 2. Ensure IPX8 waterproof width. Do not reduce IPX8 limit waterproof width in exchange for antenna performance.

[0031] 3. If the opening slot of the plastic bracket 102 is too wide, the strength of the frame will be sacrificed, bringing the risk of the soft extrusion antenna being broken and cracked.

[0032] 4. The gold-plated sheets need to be soldered reliably to reduce the risk of false soldering and cold soldering as much as possible.

[0033] like Figures 1 to 3 As shown, it shows an existing antenna assembly installation scheme A, the plastic bracket 102 is used as a structural medium, and together with the reinforcing plate 108, the FPC 101 of the antenna assembly is supported, the antenna device 104, the spring 103 (feeding / grounding function, depending on the antenna requirements) and the like are welded on the FPC 101, the metal part of the frame is designed to be L-shaped, the L-shaped double-row bottom solder gold-plated sheet 105 is welded on the metal frame through the bottom double-row solder points, the side wall grounding area and the grounding spring overvoltage form a loop, to achieve the grounding function; the single-sided soldered gold-plated sheet 106 (the structure can be Figure 7 The same) is welded to the frame through the side welding metal block, and the feeding spring and the single-sided welded gold-plated sheet 106 are over-pressurized to form a feeding loop, thereby achieving the function of improving the antenna performance.

[0034] Figure 1 The main disadvantages of the antenna assembly installation scheme shown are as follows:

[0035] Disadvantage 1: The double-row welding points have larger requirements on the size chain of the battery compartment side wall. The slot hole is 1.72mm wide in the X direction (i.e. the slot width direction). If this solution is adopted, the battery size will sacrifice 0.45mm in the X direction, about 40mAh, and the battery capacity cannot remain highly competitive; due to the large slot width, the frame strength is sacrificed, and there is a risk of soft extrusion antenna breaking.

[0036] Disadvantage 2: From the perspective of welding, the L-shaped gold-plated sheet is welded at the bottom, and the design space in the Z direction (i.e. the thickness direction of the electronic device) is deep, there is a phenomenon of false welding, and there is a risk of failure of the antenna board function.

[0037] Disadvantage 3: The X-direction space is simply the thickness of the spring, FPC, reinforcement plate and plastic bracket. The X-direction space is not perfect, resulting in the stacking of the whole machine not being perfect.

[0038] In order to solve the problem of the X-direction size of the battery compartment and reduce the width of the opening slot, another existing antenna assembly installation solution B adopts the following method: Figure 4The L-shaped single-row bottom solder gold-plated sheet 107 shown in the figure, the antenna assembly installation scheme B is similar to the technical principle of scheme A, and the optimization technical point is that the L-shaped gold-plated sheet uses a single row of solder joints, which shortens the width of the opening slot for installing the antenna small board. However, the main disadvantages of scheme B include:

[0039] Disadvantage 1: The L-shaped single-row bottom solder gold-plated sheet is an unconventional solution, which requires a new mold. The welding and assembly consistency requires initial investment testing, which increases costs.

[0040] Disadvantage 2: The opening slot for installing the antenna component is narrow and deep. When welding and placing the gold-plated sheet, it is not easy to clamp it and it is offset in the three directions of XYZ. The size of the welding claw is too small, and the claw structure is too weak and easy to deform, resulting in loose pressing, causing welding cold solder joints, a welding yield loss of about 3.5%, and a cost increase of about 6 yuan.

[0041] As can be seen from the above, in the existing antenna assembly installation scheme, there is a contradiction between the design space of the battery compartment side wall in the X direction and the battery capacity and frame strength, as well as the L-shaped gold-plated sheet having cold solder joints, the simple forward stacking of the plastic bracket resulting in incomplete stacking, and the high cost of single-row solder joints and high welding yield loss. Based on this, it can be seen that how to design an antenna assembly installation scheme to free up more space for the battery is a great design difficulty for those skilled in the art.

[0042] The following is combined with Figures 5 to 13 , the electronic device provided in the embodiment of the present application is described in detail through specific embodiments and their application scenarios.

[0043] Please refer to Figures 5 to 13 , an embodiment of the present application provides an electronic device, including:

[0044] The frame and the antenna assembly, the frame comprises a plastic part 7 and a metal part 1, the plastic part 7 is embedded in the metal part 1, the metal part 1 is provided with a groove 11, and the antenna assembly is arranged in the groove 11;

[0045] The antenna assembly includes an antenna shrapnel 21 and a flexible circuit board 2. The antenna shrapnel 21 is arranged on the flexible circuit board 2. The groove 11 includes a first side wall 111 and a second side wall 112 opposite to each other. The antenna shrapnel 21 is connected to the first side wall 111 through a first welding member 4. The flexible circuit board 2 is connected to the second side wall 112. It should be noted that Figure 1 The prior art solution shown is to combine an L-shaped gold-plated sheet with an L-shaped metal groove, and to weld at the bottom of the L-shaped gold-plated sheet, and to realize the antenna ground return function by over-pressuring the ground feed spring. The embodiment of the present application opens a groove 11 on the metal part 1 of the frame, and combines the first welding part 4 with the first side wall 111 to realize the ground return function, without the need to use an L-shaped bottom solder gold-plated sheet, thus getting rid of the use limitation of the L-shaped bottom solder gold-plated sheet.

[0046] In the above embodiment, by opening a groove 11 for installing the antenna assembly in the metal part 1 of the frame, the first welding part 4 alone can be used to achieve a fixed connection of the antenna spring 21, thereby getting rid of the limitation of the use of the L-shaped gold-plated sheet and avoiding the double-row solder joints at the bottom of the L-shaped gold-plated sheet from occupying the width of the installation slot of the flexible circuit board, thereby freeing up more installation space for the battery.

[0047] In some optional embodiments, the first welding member 4 has a plate-shaped plane, a plurality of welding points are arranged on the plate-shaped plane, and the first welding member 4 is welded to the first side wall 111 through the plurality of welding points.

[0048] For example, Figure 7 As shown, the first welding member 4 is not an L-shaped structure, and has two rows of welding points on the plate-shaped plane of the first welding member 4. Each row has 4 welding points, for a total of 8 welding points.

[0049] In some optional embodiments, the electronic device further includes a fixing bracket 3 disposed in the groove 11 , the fixing bracket 3 is provided with a recessed area 31 , and the flexible circuit board 2 is embedded in the recessed area 31 .

[0050] like Fig.13 As shown, it is a schematic diagram of the structure of the fixing bracket 3. By embedding the flexible circuit board 2 in the recessed area 31 of the fixing bracket 3, the fixing bracket 3 can protect and support the flexible circuit board 2, and realize the spatial reuse of the flexible circuit board 2 and the fixing bracket 3 in the width direction of the groove 11, avoiding the thickness overlap of the flexible circuit board 2 and the fixing bracket 3, and reducing the groove width occupation of the groove 11, which can free up more installation space for the battery. Among them, the X direction is parallel to the width direction of the groove 11.

[0051] In some embodiments, the flexible circuit board 2 is fixedly connected to the reinforcing plate 5 on a side facing away from the recessed area 31 , and the recessed area 31 and the reinforcing plate 5 surround the flexible circuit board 2 .

[0052] In specific implementation, the side of the flexible circuit board 2 facing away from the antenna shrapnel 21 is fixedly connected to the reinforcing plate 5 via double-sided adhesive, and the side of the reinforcing plate 5 facing away from the flexible circuit board 2 is in contact with the second side wall 112 .

[0053] like Fig. 9 and Fig.10 As shown, the flexible circuit board 2 is embedded in the recessed area 31 of the fixing bracket 3 , and the fixing bracket 3 and the reinforcing plate 5 surround the flexible circuit board 2 , which can better protect and support the flexible circuit board 2 .

[0054] like Fig. 9 and Fig.13As shown, in some optional embodiments, the fixing bracket 3 is provided with a hollow structure 32 at a position corresponding to the antenna shrapnel 21 , and the antenna shrapnel 21 passes through the hollow structure 32 and is connected to the first side wall 111 through the first welding part 4 .

[0055] In specific implementation, the flexible circuit board 2 is adhered to the fixing bracket 3 by double-sided tape on one side where the antenna spring piece 21 is installed. The antenna spring piece 21 passes through the hollow structure 32 and is connected to the first side wall 111 through the first welding piece 4.

[0056] In this way, the fixed bracket 3 can reuse the space of the antenna shrapnel 21 in the slot width direction, so that the thickness of the antenna shrapnel 21 and the fixed bracket 3 do not overlap, reducing the space occupied in the slot width direction, making the battery compartment side wall X more extreme upward, and realizing the improvement of battery capacity. In specific implementation, the width of the U-shaped metal slot 11 can be made 1.27mm, realizing the narrowest opening slot.

[0057] For example, Figure 1 In the cross-sectional view shown, the width of the opening of the frame in the X direction (i.e. the width of the groove 11) = the thickness of the gold plate + the thickness of the spring 103 + the thickness of the FPC 101 + the thickness of the reinforcing plate 108 + the thickness of the plastic bracket 102. Figure 5 In the cross-sectional view shown, the width of the opening of the metal part 1 of the frame in the X direction = the thickness of the first welding member 4 + the thickness of the antenna spring 21 + the thickness of the flexible circuit board 2 + the thickness of the reinforcing plate 5. Figure 1 As shown in the prior art solution, the present application saves the thickness of the plastic bracket 102, thus saving the space occupied as a whole.

[0058] In some optional embodiments, a notch 113 is formed on the second side wall 112 at a position corresponding to the first welding member 4 , and a bottom edge of the notch 113 is higher than the surface of the battery 8 .

[0059] Optionally, the bottom edge of the notch 113 is 0.1 mm higher than the folded ear of the battery cell in the battery 8. In this way, the battery safety and the welding feasibility of the first welding member 4 can be ensured.

[0060] like Fig. 9 and Fig.12 In some optional embodiments, a control chip 23 is provided on the flexible circuit board 2, the control chip 23 is covered with a protective cover 6, and the control chip 23 includes a frequency modulation switch.

[0061] The protective cover 6 is a plate-shaped structure, and the distance between the protective cover 6 and the control chip is determined by the height of the control chip. Compared with the existing design structure of the four-sided shielding cover, this embodiment can reduce the space occupied by the protective cover 6 in the Z direction, and under the premise of unchanged protection performance, it can also ensure the strength of the fixing bracket 3 and avoid the risk of the flexible circuit board 2 being disassembled and broken.

[0062] In addition, the FM switch was moved from the original mainboard position to the flexible circuit board 2 on the side, so that the antenna frequency band can be tuned by directly switching the equivalent series capacitor. The low-frequency FS / game performance was improved by 2-3db, improving the gap problem of the low-frequency TOP8 indicators of previous generations. At the same time, the FM solution can reduce the switching loss of N5 / N8 by 0.5-1db, achieving a leap in performance.

[0063] In some optional embodiments, disassembly portions 33 are provided at both ends of the fixing bracket 3 , and the thickness of the disassembly portions 33 is smaller than the groove width of the groove 11 .

[0064] In this embodiment, by adding disassembly parts 33 at both ends of the fixing bracket 3, the fixing bracket 3 is conveniently disassembled, ensuring that after-sales personnel can normally replace parts. The thickness of the disassembly part 33 is designed to be smaller than the groove width of the groove 11, so that when the flexible circuit board 2 is in the installed state, it is convenient for after-sales personnel to use tweezers to penetrate the gaps on both sides of the disassembly part 33 to take out the fixing bracket 3.

[0065] In some optional embodiments, a buckle 34 is provided on the fixing bracket 3, and a clamping groove is provided on the inner side wall of the groove 11;

[0066] When the fixing bracket 3 is installed in the groove 11 , the buckle 34 is buckled and connected with the groove.

[0067] like Fig. 9 In the figure, buckles 34 are respectively added at both ends of the fixing bracket 3, which cooperate with the card slots (not shown) in the groove 11 to position the fixing bracket 3 and prevent the fixing bracket 3 from moving up and down in the groove 11, thereby ensuring the installation stability and function of the flexible circuit board 2.

[0068] In some optional embodiments, the thickness L2 of the first side wall 111 in the first direction is greater than 0.4 mm;

[0069] The first direction is parallel to the first plane and perpendicular to the extension direction of the groove 11 , and the first plane is perpendicular to the thickness direction of the electronic device.

[0070] Optionally, the first plane is a screen on which a screen of the electronic device is located.

[0071] It should be noted that, in a specific implementation, a portion of the plastic clearance area of ​​the frame should be replaced with a certain thickness of metal as the first side wall 111 to avoid increasing the space occupied in the X direction. However, since the compensated thickness metal has welding points, the thickness L2 here should be greater than 0.4 mm to avoid welding through the metal in the later process, resulting in abnormal grounding.

[0072] In some optional embodiments, the thickness L1 of the plastic portion 7 in the first direction is greater than 1.5 mm;

[0073] The first direction is parallel to the first plane and perpendicular to the extension direction of the groove 11 , and the first plane is perpendicular to the thickness direction of the electronic device.

[0074] It should be noted that after replacing part of the plastic clearance area of ​​the frame with a certain thickness of metal as the first side wall 111, the antenna clearance, i.e. the plastic part 7 in the frame, must ensure that the thickness L1 in the X direction (parallel to the slot width direction) is greater than 1.5 mm. Figure 5 The thickness L1 shown in the figure is preferably greater than 1.8 mm, so as to minimize the impact on the antenna clearance while ensuring the extreme width in the X direction. It should be noted that if the thickness L1 of the plastic part 7 cannot be 1.5 mm, antenna simulation is required to confirm whether the impact is acceptable.

[0075] In some optional embodiments, the antenna spring clip 21 includes: a first feeding spring clip 211 and a second feeding spring clip 212, a first ground feeding spring clip 213 and a second ground feeding spring clip 214; wherein, the arrangement order of each antenna spring clip 21 on the flexible circuit board 2 is: the first ground feeding spring clip 213, the first feeding spring clip 211, the second feeding spring clip 212 and the second ground feeding spring clip 214.

[0076] like Fig. 9 In the embodiment, the first ground feeding spring piece 213 and the second ground feeding spring piece 214 are distributed on both sides of the flexible circuit board 2 in the length direction, and the first power feeding spring piece 211 and the second power feeding spring piece 212 are arranged between the first power feeding spring piece 213 and the second power feeding spring piece 214 .

[0077] In a specific implementation, the first ground feeding spring piece 213 and the second ground feeding spring piece 214 are connected to the grounding area of ​​the frame through the first welding member 4 , and the first ground feeding spring piece 213 and the second ground feeding spring piece 214 are connected to the antenna through the first welding member 4 .

[0078] It should be noted that the first ground feeding spring 213, the first power feeding spring 211, the second power feeding spring 212, the second ground feeding spring 214 and other devices on the flexible circuit board 2 are reasonably distributed and arranged as low as possible in the Z direction (i.e., the thickness direction of the electronic device) to increase the thickness of the fixing bracket 3 in the Z direction, which can play a good protective role.

[0079] In addition, if Fig.11 As shown, after the fixing bracket 3, the flexible circuit board 2 and the reinforcing plate 5 are installed, they are assembled downwardly facing the groove 11 to ensure that the first ground feeding spring piece 213, the first power feeding spring piece 211, the second power feeding spring piece 212 and the second ground feeding spring piece 214 are respectively aligned with the first welding part 4, and then the buckles 34 on both sides are pressed to make the buckles 34 engage with the card slots to ensure the stability of the installation state of the fixing bracket 3, and finally connected to the main board through the BTB on the flexible circuit board 2.

[0080] Among them, the low-frequency solution of the antenna assembly in the embodiment of the present application uses two antenna gaps, and the length of the GH segment is increased, and the effective radiator of the antenna becomes larger. In addition, by reducing the width of the groove 11, more installation space is freed up for the battery, and the distance from the edge of the battery compartment side wall to the battery BTB is increased, which can optimize the risk of FPC buckling tearing of the battery BTB.

[0081] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0082] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0083] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An electronic device, characterized in that: include: A frame and an antenna assembly, wherein the frame comprises a plastic part and a metal part, the plastic part is embedded in the metal part, the metal part is provided with a groove, and the antenna assembly is arranged in the groove; The antenna assembly includes an antenna shrapnel and a flexible circuit board, the antenna shrapnel is arranged on the flexible circuit board, the groove includes a first side wall and a second side wall opposite to each other, the antenna shrapnel is connected to the first side wall through a first welding part, and the flexible circuit board is connected to the second side wall.

2. The electronic device according to claim 1, characterized in that: The first welding member has a plate-shaped plane, a plurality of welding spots are arranged on the plate-shaped plane, and the first welding member is welded and connected to the first side wall via the plurality of welding spots.

3. The electronic device according to claim 1, characterized in that: The electronic device further comprises a fixing bracket arranged in the groove, the fixing bracket is provided with a recessed area, and the flexible circuit board is embedded in the recessed area.

4. The electronic device according to claim 3, characterized in that: The fixing bracket is provided with a hollow structure at a position corresponding to the antenna spring piece. The antenna spring piece passes through the hollow structure and is connected to the first side wall through the first welding piece.

5. The electronic device according to claim 3, characterized in that: The flexible circuit board is fixedly connected to the reinforcing plate on a side away from the recessed area, and the recessed area and the reinforcing plate surround the flexible circuit board.

6. The electronic device according to claim 1, characterized in that: A notch is formed on the second side wall at a position corresponding to the first welding piece, and a bottom edge of the notch is higher than a surface of the battery.

7. The electronic device according to claim 1, characterized in that: A control chip is arranged on the flexible circuit board, a protective cover is arranged on the control chip, and a frequency modulation switch is included in the control chip.

8. The electronic device according to claim 3, characterized in that: Both ends of the fixing bracket are provided with disassembly parts, and the thickness of the disassembly parts is smaller than the groove width of the groove.

9. The electronic device according to claim 3, characterized in that: The fixing bracket is provided with a buckle, and the inner side wall of the groove is provided with a clamping groove; When the fixing bracket is installed in the groove, the buckle is buckled and connected with the slot.

10. The electronic device according to claim 1, characterized in that: The thickness of the first side wall in the first direction is greater than 0.4 mm; The first direction is parallel to the first plane and perpendicular to the extending direction of the groove, and the first plane is perpendicular to the thickness direction of the electronic device.

11. The electronic device according to claim 1, characterized in that: The thickness of the plastic part in the first direction is greater than 1.5 mm; The first direction is parallel to the first plane and perpendicular to the extending direction of the groove, and the first plane is perpendicular to the thickness direction of the electronic device.

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