Middle frame of electronic device, processing method for middle frame of electronic device, and electronic device

Abstract

Embodiments of present application provide a middle frame of an electronic device, a processing method for a middle frame of an electronic device, and an electronic device. The present application can take into account both the requirements for combining and fixing a display panel and a middle frame, and the requirements for optimizing antenna performance and enhancing signal strength. The middle frame comprises a third surface located on the outer side of the middle frame, and the middle frame further comprises: a middle frame body, comprising a second middle frame body surface facing a display panel, and a fourth middle frame body surface located on the inner side of the middle frame and configured to be connected to an antenna spring contact; and a middle frame protruding portion, comprising a fourth middle frame protruding portion surface located on the inner side of the middle frame, wherein the middle frame protruding portion is connected to the middle frame body, the connection position between the middle frame protruding portion and the middle frame body is located between the edge of the second middle frame body surface close to the fourth middle frame body surface and the edge of the fourth middle frame body surface close to the second middle frame body surface, and the middle frame protruding portion is configured to be connected to the display panel. The distance between the fourth middle frame protruding portion surface and the third surface is greater than the distance between the fourth middle frame body surface and the third surface.

Description

A middle frame of an electronic device, a processing method of the middle frame of the electronic device, and the electronic device

[0001] The present application claims priority from the Chinese patent application No. 202411047423.9 filed on July 31, 2024, and entitled "A middle frame of an electronic device, a processing method of the middle frame of the electronic device, and the electronic device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of electronic devices, and in particular to a middle frame of an electronic device, a processing method of the middle frame of the electronic device, and the electronic device. BACKGROUND

[0003] With the continuous development of electronic technology, electronic devices such as mobile phones and tablets are widely used in people's daily life and work, bringing great convenience to people's daily life and work. These electronic devices include a display panel and a middle frame, and the glass cover plate frame of the display panel is bonded to the middle frame of the electronic device to achieve the purpose of combining and fixing the display panel and the middle frame.

[0004] However, in order to improve the screen-to-body ratio and display more content on the same volume of electronic device, electronic devices are improved towards narrow frames. FIG. 1 is a structural schematic diagram of an electronic device provided by the related art, and FIG. 2 is a cross-sectional view of an electronic device along the AA' direction of FIG. 1. Referring to FIGS. 1 and 2, the electronic device 100 can include a middle frame 10, a back cover 20, and a display panel 30. The display panel 30 includes a glass cover plate 31 and a super clean foam (SCF) layer 32. In order to make the visual black border area of the electronic device narrower, the frame width of the glass cover plate 31 needs to be reduced. However, due to the excessively narrow frame of the glass cover plate 31, the glass cover plate 31 cannot be bonded to the middle frame 10 to achieve the purpose of combining and fixing the display panel 30 and the middle frame 10, so the thickness of the middle frame 10 in the length direction and the width direction of the electronic device needs to be increased, so that the super clean foam (SCF) layer 32 of the display panel 30 can be bonded to the middle frame 10 by the adhesive 33 and has sufficient bonding area.

[0005] However, the thickness of the middle frame 10 in the length direction and the width direction of the electronic device is relatively thick, and the excessively thick thickness of the middle frame 10 leads to a too large distance between the antenna spring sheet welded on the inner side of the middle frame 10 and the outer side of the middle frame 10, which reduces the performance of the antenna. SUMMARY

[0006] To solve the above technical problems, the application provides a middle frame of an electronic device, a middle frame processing method of an electronic device and an electronic device, which can meet the requirements of fixing the display panel and the middle frame together and optimizing the antenna performance and enhancing the signal strength.

[0007] In a first aspect, the embodiments of the application provide a middle frame of an electronic device, which comprises a third surface on the outer side of the middle frame, and further comprises: a middle frame body, which comprises a second surface of the middle frame body facing the display panel, and a fourth surface of the middle frame body on the inner side of the middle frame, which is used for connecting the antenna spring; a middle frame protruding part, which comprises a fourth surface of the middle frame protruding part on the inner side of the middle frame, and is connected to the middle frame body, the connection position of the middle frame protruding part and the middle frame body is between the second surface of the middle frame body, the edge of the fourth surface of the middle frame body close to the second surface of the middle frame body, and the edge of the fourth surface of the middle frame body close to the second surface of the middle frame body, and the middle frame protruding part is used for connecting the display panel; wherein the distance between the fourth surface of the middle frame protruding part and the third surface is greater than the distance between the fourth surface of the middle frame body and the third surface.

[0008] The middle frame of the embodiments of the application is provided with the middle frame protruding part and the middle frame body close to the side of the display panel, the display panel can be bonded by the middle frame protruding part, and the display panel and the middle frame are fixed. The middle frame is not provided with the middle frame protruding part close to the side of the back shell, and only the middle frame body is provided. Therefore, the distance between the inner side surface and the outer side surface of the middle frame in this area is close, that is, the middle frame is thin, which is suitable for conducting communication signals such as radio signals. It can be seen that such a setting mode meets the requirements of fixing the display panel and the middle frame together and optimizing the antenna performance and enhancing the signal strength.

[0009] In some possible implementation manners, the middle frame protruding part comprises a first surface of the middle frame protruding part facing away from the display panel, and the first surface of the middle frame protruding part comprises a first sub-surface of the middle frame protruding part; for the middle frame protruding part extending in a direction parallel to the length direction of the electronic device, the plane where the first sub-surface of the middle frame protruding part is located and the width direction of the electronic device form a first preset angle; for the middle frame protruding part extending in a direction parallel to the width direction of the electronic device, the plane where the first sub-surface of the middle frame protruding part is located and the length direction of the electronic device form a second preset angle; so that the closer to the geometric center of the middle frame, the higher the clearance height of the electronic device in the thickness direction of the area where the antenna spring is located. The first sub-surface of the middle frame protruding part is provided as an inclined plane, which can facilitate the subsequent operation of welding the antenna spring to the middle frame, thereby improving the assembly efficiency and reducing the assembly difficulty.

[0010] In some possible implementation manners, the first preset angle and / or the second preset angle is 10-15 degrees. Such a preset angle can not only ensure that the middle frame protruding part has sufficient structural strength, but also form a suitable space required for subsequent assembly, thereby facilitating the assembly of the antenna spring.

[0011] In some possible implementation manners, the middle frame protruding portion includes a middle frame protruding portion first surface facing away from the display panel, and a clearance space is arranged between the space where the antenna spring sheet is located and the middle frame protruding portion first surface. Such an arrangement manner can provide a proper clearance space, and facilitate the assembly of the antenna spring sheet.

[0012] In some possible implementation manners, the middle frame protruding portion first surface is parallel to the length direction and the width direction of the electronic device. Such an arrangement manner has the characteristic of being easy to process.

[0013] In some possible implementation manners, the electronic device further includes an antenna spring sheet and an antenna flexible circuit board, the antenna flexible circuit board includes a flexible circuit board body, a spring sheet connecting portion, a communication portion and a hollowed portion, the communication portion and the hollowed portion are arranged between the flexible circuit board body and the spring sheet connecting portion, the flexible circuit board body and the spring sheet connecting portion are connected through the communication portion and disconnected at the hollowed portion; and the spring sheet connecting portion is configured to be connected with the antenna spring sheet. Considering that there may be errors in the assembly of the antenna spring sheet and the antenna FPC to the middle frame, the antenna FPC is provided with the hollowed portion, which is more easy to stretch or compress the length, thereby absorbing the length deformation of the antenna FPC caused by the assembly errors, and further ensuring the welding precision of the antenna spring sheet.

[0014] In some possible implementation manners, the antenna spring sheet and the middle frame body fourth surface are connected through a laser spot welding process. The laser spot welding process is mature, and can ensure that the antenna spring sheet is effectively welded to the middle frame body, and has high reliability.

[0015] In some possible implementation manners, the antenna spring sheet and the spring sheet connecting portion are connected through a laser surface assembly technology. The laser surface assembly technology is mature and has high reliability.

[0016] In a second aspect, the embodiments of the present application further provide a processing method of an electronic device middle frame, used for processing and preparing the middle frame of any one of the above electronic devices, and including the following steps:

[0017] Obtaining an electronic device middle frame to-be-processed part;

[0018] Milling the middle frame body fourth surface and a first R angle by using a first size milling cutter;

[0019] Forming an opening window on a side of the middle frame away from the display panel;

[0020] Extending a second size milling cutter into the opening window, milling the middle frame body fourth surface and a second R angle at the first R angle position;

[0021] The first R angle is greater than the second R angle.

[0022] By the secondary processing of the R angle position by the small size milling cutter, the large R angle can be processed into the fourth surface of the middle frame body and the small r angle. The R angle is reduced, and the space occupation is reduced. The advantage is that the antenna spring can be closer to the antenna slot, the antenna performance is optimized, and the signal strength is enhanced.

[0023] In some possible implementation manners, the method further includes, after milling the fourth surface of the middle frame body and the second R angle, filling the window.

[0024] In a third aspect, the embodiments of the present application further provide an electronic device, including the middle frame of any one of the electronic devices or using the processing method of any one of the electronic devices. BRIEF DESCRIPTION OF DRAWINGS

[0025] FIG. 1 is a structural schematic diagram of an electronic device provided by the related art;

[0026] FIG. 2 is a sectional view of an electronic device along the direction of AA' in FIG. 1;

[0027] FIG. 3 is a structural schematic diagram of a mobile phone provided by the embodiments of the present application;

[0028] FIG. 4 is a structural schematic diagram of a mobile phone obtained by cutting along the direction of BB' in FIG. 3;

[0029] FIG. 5 is a structural schematic diagram of a middle frame obtained by cutting along the direction of BB' in FIG. 3;

[0030] FIG. 6 is a sectional view of an edge of a middle frame of a mobile phone along the direction of BB' in FIG. 3;

[0031] FIG. 7 is another sectional view of an edge of a middle frame of a mobile phone along the direction of BB' in FIG. 3;

[0032] FIG. 8 is a sectional view of another edge of a middle frame of a mobile phone along the direction of BB' in FIG. 3;

[0033] FIG. 9 is a sectional view of another edge of a middle frame of a mobile phone along the direction of BB' in FIG. 3;

[0034] FIG. 10 is a sectional view of an edge of a middle frame of a mobile phone before milling along the direction of BB' in FIG. 3;

[0035] FIG. 11 is a sectional view of an edge of a middle frame of a mobile phone in the milling process along the direction of BB' in FIG. 3;

[0036] FIG. 12 is a structural schematic diagram of a middle frame of a mobile phone provided by the embodiments of the present application;

[0037] FIG. 13 is a structural schematic diagram of a flexible circuit board of a mobile phone antenna provided by the embodiments of the present application. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0039] The term "and / or" used in the present application is only used to describe the association relationship of the associated objects, and means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone.

[0040] The words such as "upper", "lower", "left", "right" and the like used in the present application are only used for the purpose of clearly explaining the embodiments, so as to describe one possible arrangement or arrangement form of the components. It is not a limitation on the relationship between the components or the setting direction.

[0041] The terms "first" and "second" and the like in the specification and claims of the embodiments of the present application are used to distinguish different objects, and are not used to describe the specific order of the objects. For example, the first target object and the second target object are used to distinguish different target objects, and are not used to describe the specific order of the target objects.

[0042] In the embodiments of the present application, the words such as "exemplary" or "for example" are used to mean by way of example, illustration or description. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the words such as "exemplary" or "for example" are intended to present the relevant concept in a specific manner.

[0043] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. For example, a plurality of processing units means two or more processing units; a plurality of systems means two or more systems.

[0044] The electronic device provided in the embodiments of the present application can be a mobile phone, a tablet computer, a personal digital assistant (PDA), a vehicle-mounted computer, a smart wearable device, a smart home device, or the like, and the embodiments of the present application do not specially limit the specific form of the electronic device. FIG. 3 is a structural schematic diagram of a mobile phone provided in the embodiments of the present application, and reference is made to FIG. 3. Hereinafter, for the convenience of description, the electronic device is taken as an example of the mobile phone. In order to clearly describe the subsequent structural features and the positional relationship of the structural features, the positional relationship of the structures in the mobile phone is defined in the X-axis direction, the Y-axis direction and the Z-axis direction. The X-axis direction is the width direction of the mobile phone, the Y-axis direction is the length direction of the mobile phone, and the Z-axis direction is the thickness direction of the mobile phone.

[0045] Continuing to refer to FIG. 3, the mobile phone 200 includes a middle frame 10, a back cover 20 and a display panel 30. The back cover 20 and the display panel 30 are oppositely arranged, and the middle frame 10 is located between the back cover 20 and the display panel 30.

[0046] FIG. 4 is a structural schematic diagram of a mobile phone obtained by cutting along the direction of BB' in FIG. 3, and reference is made to FIG. 3 and FIG. 4, wherein the back cover 20 is omitted in FIG. 4. The middle frame 10 includes oppositely arranged first and second surfaces 101 and 102, and further includes third and fourth surfaces 103 and 104 connecting the first and second surfaces 101 and 102. The third surface 103 is located, for example, at the outer side of the mobile phone 200, that is, the outer side of the middle frame 10, and is the outer side surface of the middle frame 10. The fourth surface 104 is located, for example, at the inner side of the mobile phone 200, that is, the inner side of the middle frame 10, and is the inner side surface of the middle frame 10. The third and fourth surfaces 103 and 104 are oppositely arranged. The back cover 20 is arranged on the first surface 101, and the display panel 30 is arranged on the second surface 102, and the first and second surfaces 101 and 102 are oppositely arranged. The middle frame 10, the back cover 20 and the display panel 30 can enclose a receiving cavity. The receiving cavity is provided with an antenna spring 40, a main board (not shown in the figure), a battery (not shown in the figure), a retaining wall (not shown in the figure) for fixing the battery, and the like. The main board is provided with a processor and a memory. The memory is used to store computer program codes. The computer program codes include computer instructions. The processor is used to call the computer instructions to make the mobile phone 200 perform corresponding operations.

[0047] The material of the middle frame 10 includes a conductive material, for example, a metal material such as aluminum or steel. FIG. 5 is a schematic structural diagram of a middle frame cut along the direction of FIG. 3 BB'. As shown in FIG. 5, the middle frame 10 includes a first part 10001 and a second part 10002, and the first part 10001 and the second part 10002 are separated by an antenna slot 10003. The material of the antenna slot 10003 can be an insulating material, for example, plastic. The radio signal transmission between the first part 10001 and the second part 10002 is blocked by the antenna slot 10003. For example, the antenna spring 40 is electrically connected to the first part 10001. The mainboard is also provided with a radio frequency module and an antenna flexible printed circuit 50 (FPC). The radio frequency module is electrically connected to the antenna spring 40 through the antenna FPC 50, so that the first part 10001 not only serves as a part of the middle frame 10, but also serves as an antenna to cooperate with the radio frequency module to complete the work of sending and receiving radio signals.

[0048] The material of the back cover 20 can include, for example, a light-tight material such as plastic, leather, and glass fiber; or a light-transmitting material such as glass. The material of the back cover 20 is not limited in the embodiments of the present application.

[0049] The display panel 30 includes, for example, a liquid crystal display (LCD) panel, an organic light emitting diode (OLED) display panel, and an LED display panel, for example, a Micro-LED display panel or a Mini-LED display panel. The type of the display panel 30 is not limited in the embodiments of the present application. The display panel 30 includes a glass cover plate farthest from the back cover 20, and an SCF layer closest to the back cover 20. In the assembly process, the SCF layer can be adhered to the second surface 102 by adhesive.

[0050] Figure 6 is a cross-sectional view of a frame edge of a mobile phone, taken along the direction of Figure 3BB'. Referring to Figure 6, the frame 10 includes a frame body 1001 and a frame protrusion 1002. The frame protrusion 1002 is disposed on the fourth side 104 of the frame 10, connected to the frame body 1001, and disposed close to the display panel 30. The frame protrusion 1002 protrudes in a direction extending away from the third side 103. The first side 101 includes a frame body first side 1011 and a frame protrusion first side 1012. The second side 102 includes a frame body second side 1021 and a frame protrusion second side 1022. The fourth side 104 includes a frame body fourth side 1041 and a frame protrusion fourth side 1042. The frame protrusion second side 1022 can be bonded to the display panel 30, for assembling the display panel 30 to the frame 10. The frame protrusion second side 1022 can be smoothly transitioned to the frame body second side 1021. Such a configuration is more conducive to the frame protrusion second side 1022 and the frame body second side 1021 being bonded to the display panel 30. This is more conducive to the display panel 30 being tightly bonded to the frame 10. Of course, the above only exemplarily introduces a configuration of the frame body second side 1021. Embodiments of the present application do not limit the shape of the frame protrusion. In some embodiments, the frame protrusion first side 1012 can be parallel to the directions of the X-axis and Y-axis of the mobile phone.

[0051] The frame body fourth side 1041 is not provided with the frame protrusion 1002. Therefore, the antenna spring can be directly electrically connected to the frame body 1001 through the frame body fourth side 1041 by welding or the like. The advantage is that the antenna spring 40 is electrically connected to the frame body fourth side 1041, and radio waves need to be conducted from the third side 103 to the fourth side 104. If the distance between the third side 103 and the fourth side 104 is too large, it is not conducive to the reception of radio waves. Embodiments of the present application provide the frame protrusion 1002 on the side of the frame body 1001 close to the display panel 30. The frame protrusion 1002 can be bonded to the display panel 30, increasing the bonding area between the display panel 30 and the frame 10 and ensuring the bonding strength. At the same time, the frame body fourth side 1041 is exposed by not providing the frame protrusion 1002 on the side of the frame body 1001 close to the back cover 20. The antenna spring 40 can be directly connected to the frame body fourth side 1041. The distance between the frame body fourth side 1041 and the third side 103 is smaller than the distance between the frame protrusion fourth side 1042 and the third side 103. This is conducive to reducing the distance between the antenna spring 40 and the outer surface of the frame 10, thereby improving the quality of the reception of radio signals by the antenna spring 40. It can be seen that such a configuration not only meets the bonding area requirement between the display panel 30 and the frame 10, but also ensures the quality of the reception and transmission of radio signals by the electronic device.

[0052] For the connection between the middle frame body 1001 and the antenna spring 40, the embodiments of the present application do not make any limitation, and any process that can form an electrical connection between the middle frame body 1001 and the antenna spring 40 can be used. For example, the combination between the middle frame body 1001 and the antenna spring 40 can be completed by laser welding. For the scheme of combining the middle frame body 1001 and the antenna spring 40 by laser welding, considering that the laser welding head needs to bypass the middle frame protruding part 1002 and enter the middle frame body fourth surface 1041 exposed by the middle frame body 1001 to weld the middle frame body 1001 and the antenna spring 40. FIG. 7 is another cross-sectional view of the edge of a mobile phone middle frame along the direction of FIG. 3BB'. Referring to FIG. 7, the existence of the middle frame protruding part 1002 makes the welding process inconvenient to operate, so the middle frame protruding part first surface 1012 can include a middle frame protruding part first sub-surface 10121. For the middle frame protruding part 1002 whose extension direction is parallel to the Y axis, the plane where the middle frame protruding part first sub-surface 10121 is located and the X axis form a first preset angle a. For the middle frame protruding part 1002 whose extension direction is parallel to the X axis, the plane where the middle frame protruding part first sub-surface 10121 is located and the Y axis form a second preset angle b. The first preset angle a and / or the second preset angle b can be determined according to actual needs. For example, the first preset angle a and / or the second preset angle b is 10-15 degrees. The Z axis clearance height of the position where the antenna spring 40 is located presents the effect that the closer to the geometric center of the middle frame 10, the higher the Z axis clearance height. In other words, in order to facilitate welding operation and leave a welding head inclination angle required for welding operation for the welding head, an inclined surface, i.e., the middle frame protruding part first sub-surface 10121, is arranged on the middle frame protruding part first surface 101. Compared with the design that the middle frame protruding part first surface 101 is parallel to the X axis and the Y axis of the mobile phone, the middle frame protruding part first sub-surface 10121 avoids the space required for the welding head inclination operation, and provides convenience for the operation of welding the middle frame body 1001 and the antenna spring 40 into one.

[0053] It should be noted that the embodiments of the present application do not limit the posture of the middle frame body fourth surface 1041. Not only can it be perpendicular to the Z axis as shown in FIGS. 6 and 7, but also can be set to a certain angle with the Z axis, which can be set according to actual needs.

[0054] Figure 9 is a cross-sectional view of another edge of a middle frame of a mobile phone, taken along the direction of Figure 3BB'. In order to solve the problem of how to avoid the space required for the operation of the welding head, the first surface 1012 of the protruding part of the middle frame can also be set as a complete plane, for example, the first surface 1012 of the protruding part of the middle frame can be parallel to the directions of the X-axis and Y-axis of the mobile phone, and an avoiding space can be set between the area where the antenna spring 40 is located and the first surface 1012 of the protruding part of the middle frame. The avoiding space leaves out the space required for the operation of the welding head, and provides convenience for the operation of welding the middle frame body 1001 and the antenna spring 40 into one.

[0055] The material of the middle frame 10 can be determined according to actual needs, for example, it can be a pure metal material, or a sandwich structure with plastic or other materials on both sides of the metal. The antenna spring 40 needs to be welded on the metal material of the middle frame 10.

[0056] For the forming method and process of the fourth surface 1041 of the middle frame body, the following can be used.

[0057] Figure 10 is a cross-sectional view of an edge of a middle frame of a mobile phone before milling processing, taken along the direction of Figure 3BB', and Figure 11 is a cross-sectional view of an edge of a middle frame of a mobile phone during milling processing, taken along the direction of Figure 3BB', see Figures 10 and 11. The T-shaped cutter 300 can be used to mill the middle frame material on the side of the first surface 1012 of the protruding part of the middle frame close to the back shell 20, and expose the fourth surface 1041 of the middle frame body. In other words, before processing, the side of the first surface 1012 of the protruding part of the middle frame close to the back shell 20 has middle frame material, and the purpose of processing is to remove the middle frame material on the side of the first surface 1012 of the protruding part of the middle frame close to the back shell 20, and to thin the thickness of the corresponding area of the middle frame 10. In this step, the T-shaped cutter 300 can be inserted into the to-be-processed part through the side of the middle frame 10 close to the display panel 30 for processing.

[0058] In some embodiments, in order to ensure that the step of milling the middle frame material to a sufficient thickness, a large size T-shaped cutter with a large depth of blade is selected, and the blade is inserted into the first side 1012 of the protruding part of the middle frame close to the rear shell 20 to mill the middle frame material to be removed. For example, a cutter head with a width of 3 mm can be selected to mill the middle frame material with a thickness of 1.1 mm. However, the end of the cutting site formed during the processing of the T-shaped cutter has a round corner (i.e. R angle), and the larger the width of the cutter head, the larger the R angle. If a cutter head with a width of 3 mm is used, the R angle is 1.5 mm. Since the R angle is an arc surface, it is not conducive to welding the antenna spring 40, and therefore the R angle on the middle frame 10 needs to be avoided, and the antenna spring 40 is welded to the fourth side 1041 of the middle frame body. Referring to FIG. 5, however, the middle frame 10 is provided with a first part 10001 and a second part 10002, and an antenna slot 10003 is arranged between the first part 10001 and the second part 10002 to block the electrical signal conduction between the first part 10001 and the second part 10002. The antenna spring 40 should be arranged as close to the antenna slot 10003 as possible, which can improve the radio signal transmission quality of the antenna. The antenna spring 40 can be arranged on the first part 10001 and / or the second part 10002 of the edge of the middle frame 10, and the fourth side 1041 of the middle frame body milled by the T-shaped cutter is located on the first part 10001 of the edge of the middle frame 10. Due to the limitations of the process, there is at least an R angle milled by the T-shaped cutter between the fourth side 1041 of the middle frame body and the antenna slot 10003, and if the R angle is large, the distance between the end of the fourth side 1041 of the middle frame body close to the antenna slot 10003 and the antenna slot 10003 is large. FIG. 12 is a structural schematic diagram of a middle frame of a mobile phone according to an embodiment of the present application, referring to FIG. 12 and continuing to refer to FIG. 5. After the fourth side 1041 of the middle frame body is processed by a large size T-shaped cutter and a first R angle R1 is formed, a window 11 is formed on the first side 101 of the middle frame 10, a small size T-shaped cutter is inserted into the window 11, and milling processing is performed. The purpose of this step is to at least reprocess the first R angle R1 between the fourth side 1041 of the middle frame body and the antenna slot 10003, and to form a small size second R angle R2 on this basis. Thus, the distance between the end of the fourth side 1041 of the middle frame body close to the antenna slot 10003 and the antenna slot 10003 is reduced. For example, a cutter head with a width of 1 mm can be selected as a small size T-shaped cutter, so that the second R angle R2 reformed is 0.5 mm. Compared with the original first R angle R1 of 1.5 mm, the second R angle R2 of 0.5 mm can reduce the distance between the end of the fourth side 1041 of the middle frame body close to the antenna slot 10003 and the antenna slot 10003 by 1 mm, which means that the welding position of the antenna spring 40 can be moved towards the antenna slot 10003 by 1 mm, and such a setting mode improves the performance of the antenna.

[0059] For the window 11 mentioned above, the filling material can be used to seal after the new second R angle R2 is formed. For example, the filling material can be Mylar, plastic sheet or glue.

[0060] For the process used to form the connection between the antenna FPC 50 and the antenna spring 40, the embodiments of the present application are not limited, and any process that can form an electrical connection between the antenna FPC 50 and the antenna spring 40 can be used. For example, the connection between the antenna FPC 50 and the antenna spring 40 can be achieved by surface mounting technology (SMT). FIG. 13 is a structural schematic diagram of a flexible circuit board of a mobile phone according to an embodiment of the present application. The antenna FPC 50 can include an FPC body 51 and a spring connecting portion 52. The FPC body 51 and the spring connecting portion 52 include a communication portion 53 and a hollow portion 54 therebetween. The FPC body 51 and the spring connecting portion 52 are connected through the communication portion 53 and disconnected at the hollow portion 54. The spring connecting portion 52 is used to connect with the antenna spring 40, and the spring connecting portion 52 is electrically connected with the FPC body 51 through the communication portion 53. The FPC body 51 can be connected to the main board of the mobile phone. The above structure is used to achieve the transmission and reception of wireless signals. Considering that there can be errors in assembling the antenna spring 40 and the antenna FPC 50 to the middle frame 10, the antenna FPC 50 is provided with the hollow portion 54, which is easier to stretch or compress the length, thereby absorbing the length deformation of the antenna FPC 50 caused by the assembly error, and further ensuring the welding precision of the antenna spring 40.

[0061] The above only exemplarily introduces the connection setting mode of the middle frame 10 and the antenna spring 40 at one position. In fact, the middle frame 10 can also be connected with multiple antenna springs 40. For example, the middle frame 10 includes a first portion, a second portion, a third portion and a fourth portion, each of which can be used as an antenna. Each of the first portion, the second portion, the third portion and the fourth portion is connected with an antenna spring 40. The connection between any one portion and the antenna spring 40 can adopt the above setting mode. In other words, the connection mode between the middle frame 10 and the antenna spring 40 in this document can be applied to any position where the middle frame 10 and the antenna spring 40 need to be connected.

[0062] The embodiments of the present application are described above in conjunction with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative, but not restrictive. Those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the protection scope of the claims.

Claims

1. A mid-frame for an electronic device, characterized in that, The middle frame includes a third surface located outside the middle frame, and the middle frame further includes: The mid-frame body includes a second side facing the display panel and a fourth side located inside the mid-frame for connecting the antenna spring. A protruding part of the middle frame, the protruding part of the middle frame includes a fourth protruding part of the middle frame located inside the middle frame, the protruding part of the middle frame is connected to the middle frame body, the connection position of the protruding part of the middle frame and the middle frame body is located between the edge of the fourth protruding part of the middle frame body and the edge of the fourth protruding part of the middle frame body near the second protruding part of the middle frame body, the protruding part of the middle frame is used to connect the display panel; The distance between the fourth surface of the protruding part of the middle frame and the third surface is greater than the distance between the fourth surface of the middle frame body and the third surface.

2. The mid-frame of the electronic device according to claim 1, characterized in that, The protruding part of the middle frame includes a first surface of the protruding part of the middle frame facing away from the display panel, and the first surface of the protruding part of the middle frame includes a first sub-surface of the protruding part of the middle frame. For the protruding portion of the middle frame extending parallel to the length direction of the electronic device, the plane containing the first sub-surface of the protruding portion forms a first preset angle with the width direction of the electronic device; for the protruding portion of the middle frame extending parallel to the width direction of the electronic device, the plane containing the first sub-surface of the protruding portion forms a second preset angle with the length direction of the electronic device; so that the closer the middle frame is to the geometric center of the middle frame, the higher the clearance height of the electronic device in the thickness direction in the area where the antenna spring is located.

3. The mid-frame of the electronic device according to claim 2, characterized in that, The first preset angle and / or the second preset angle is 10-15 degrees.

4. The mid-frame of the electronic device according to claim 1, characterized in that, The protruding part of the middle frame includes a first surface of the middle frame protruding part facing away from the display panel, and a clearance space is provided between the space where the antenna spring is located and the first surface of the middle frame protruding part.

5. The mid-frame of the electronic device according to claim 4, characterized in that, The first surface of the protruding part of the middle frame is parallel to the length and width directions of the electronic device.

6. The mid-frame of the electronic device according to claim 1, characterized in that, It also includes the antenna spring and the antenna flexible circuit board. The antenna flexible circuit board includes a flexible circuit board body, a spring connecting part, a connecting part and a cut-out part. The connecting part and the cut-out part are disposed between the flexible circuit board body and the spring connecting part. The flexible circuit board body and the spring connecting part are connected through the connecting part and disconnected at the cut-out part. The reed connecting part is used to connect with the antenna reed.

7. The mid-frame of the electronic device according to claim 6, characterized in that, The antenna spring and the fourth surface of the middle frame body are connected by laser spot welding.

8. The mid-frame of the electronic device according to claim 6, characterized in that, The antenna spring and the spring connecting part are connected by laser surface mount technology.

9. A method for processing a mid-frame of an electronic device, used to process and manufacture the mid-frame of the electronic device according to any one of claims 1-8, characterized in that, include: Obtain the mid-frame of the electronic device to be processed; Using a milling cutter of the first size, the fourth surface and the first radius corner of the middle frame body are milled out; An opening is formed on the side of the middle frame away from the display panel; Insert the second-sized milling cutter into the window and mill out the fourth surface and the second R-corner of the middle frame body at the first R-corner position; Wherein, the first R angle is greater than the second R angle.

10. The method for processing the frame of an electronic device according to claim 9, characterized in that, After milling out the fourth surface and the second R-angle of the middle frame body, the process also includes filling the window.

11. An electronic device, characterized in that, It includes the mid-frame of the electronic device according to any one of claims 1-8, or uses the processing method of the mid-frame of the electronic device according to claim 9 or 10.

Images