Rear cover assembly and electronic device

Abstract

The application provides a back cover assembly and an electronic device. The back cover assembly comprises a back cover and a camera decoration piece. The back cover comprises a cover body and a plurality of first connecting parts. The cover body is provided with a mounting hole. The plurality of first connecting parts are connected to the inner wall of the mounting hole along the circumferential direction of the mounting hole. Adjacent two first connecting parts form a gap. The camera decoration piece comprises a decoration piece body and a plurality of second connecting parts. The first end of the decoration piece body is located on the outside of the cover body. The decoration piece body passes through the mounting hole. The second end of the decoration piece body is located on the inside of the cover body. The plurality of second connecting parts are located on the inside of the cover body and are connected to the second end of the decoration piece body along the circumferential direction of the decoration piece body. The maximum extension length of the second connecting part along the circumferential direction of the decoration piece body is less than or equal to the minimum extension length of the gap along the circumferential direction of the mounting hole. The technical scheme of the application can simplify the assembly process of the back cover assembly and improve the assembly efficiency of the back cover assembly.

Description

Technical Field

[0001] This application relates to the field of electronic devices, and more particularly to a back cover assembly and an electronic device. Background Technology

[0002] With the development of electronic devices such as mobile phones and tablets, users are placing increasingly higher demands on these devices. In electronic devices with cameras, the camera trim is a key component mounted on the back cover to secure and protect the camera. Currently, to achieve reliable fixation between the camera trim and the back cover, the fixing methods are relatively complex, reducing assembly efficiency. Summary of the Invention

[0003] The embodiments of this application provide a back cover assembly and an electronic device that can simplify the assembly process of the back cover assembly and improve the assembly efficiency of the back cover assembly.

[0004] In a first aspect, this application provides a back cover assembly, the back cover assembly including a back cover and a camera trim piece:

[0005] The rear cover includes a cover body and a plurality of first connecting parts. The cover body is provided with a mounting hole, which penetrates the cover body along the thickness direction. The plurality of first connecting parts are spaced apart on the inner wall of the mounting hole along the circumferential direction of the mounting hole. A notch is formed between two adjacent first connecting parts. The minimum extension length of the notch along the circumferential direction of the mounting hole is a first length.

[0006] The camera decorative component is installed in the mounting hole. The camera decorative component includes a decorative component body and a plurality of second connecting parts. The first end of the decorative component body is located on the outside of the cover. The decorative component body passes through the mounting hole. The second end of the decorative component body is located on the inside of the cover. The plurality of second connecting parts are all located on the inside of the cover and are connected to the second end of the decorative component body at intervals along the circumferential direction of the decorative component body. The maximum extension length of the second connecting part along the circumferential direction of the decorative component body is the second length. The second length is less than or equal to the first length.

[0007] The decorative component body and a plurality of second connecting parts surround and form a plurality of slots, wherein a first connecting part is located in a slot and is fixedly connected to a second connecting part.

[0008] In related technologies, back cover assemblies are mostly designed with a sandwich structure, consisting of an inner camera trim piece, a back cover, and an outer camera trim piece. The inner and outer camera trim pieces are fixed to the back cover using screws. However, during the assembly of the back cover assembly, precise alignment of the positional relationships between the inner and outer camera trim pieces, and between the back cover and both the inner and outer camera trim pieces, is required. Furthermore, multiple screws need to be installed inside the back cover assembly. This makes the assembly process complex and significantly reduces production efficiency.

[0009] Therefore, in the embodiments of this application, since the second length of the second connecting portion along the circumferential direction of the decorative body is less than or equal to the first length of the notch along the circumferential direction of the mounting hole, when assembling the camera decorative part with the back cover, each second connecting portion of the camera decorative part can be aligned with a notch in the back cover and placed into a notch in the back cover. Then, the camera decorative part can be rotated clockwise or counterclockwise so that each first connecting portion of the back cover is correspondingly engaged in a slot of the camera decorative part, thereby completing the assembly of the camera decorative part and the back cover. That is, in the embodiments of this application, the purpose of engaging the first connecting portion in the slot can be achieved by rotational assembly. This method of connecting the second connecting portion and the first connecting portion by rotational assembly of the camera decorative part and the back cover is simple, efficient, simplifies the assembly process of the back cover assembly, and improves the production efficiency of the back cover assembly.

[0010] Furthermore, this rotary assembly method allows for smooth assembly of the camera trim to the back cover regardless of whether it is a separate or integrated structure. In other words, by connecting multiple second connecting parts of the camera trim to multiple first connecting parts of the back cover, a fixed connection between the camera trim and the back cover is achieved. This eliminates the need for screw assembly in related technologies, further reducing the assembly cost and weight of the back cover assembly. In other words, in the embodiments of this application, only the camera trim and the back cover need to be assembled, greatly simplifying the assembly process of the back cover assembly.

[0011] In one possible implementation, the back cover assembly includes a plurality of adhesive members, each of which is located within one of the slots and connected between a first connecting portion and a second connecting portion. Each adhesive member includes a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is used to connect with the first connecting portion, and the second adhesive layer is used to connect with the second connecting portion when a preset condition is met.

[0012] By providing an adhesive component in the back cover assembly, a fixed connection between the first connecting part and the second connecting part can be achieved, thereby achieving a fixed connection between the back cover and the camera decorative part.

[0013] In one possible implementation, the material of the first adhesive layer is a self-adhesive material, and the material of the second adhesive layer is a hot-melt material or a photosensitive material.

[0014] By designing the first adhesive layer of the adhesive component as a conventional adhesive layer—that is, a self-adhesive layer that can adhere to materials on other surfaces without external force—while designing the second adhesive layer as a special adhesive layer, the adhesive component can be initially attached only to the first connecting part of the back cover. The other side is not adhesive before assembly, but becomes adhesive after assembly. This effectively prevents the adhesive component's own stickiness from causing it to adhere to the edges of the camera trim during rotational assembly, thus avoiding obstacles to rotational assembly.

[0015] In one possible implementation, the thickness of the adhesive is 0.15mm-0.35mm.

[0016] By setting the thickness of the adhesive component within the aforementioned range, the thickness of the adhesive component can be minimized while ensuring its bonding strength, thereby reducing the protrusion thickness of the camera trim component relative to the back cover.

[0017] In one possible implementation, the overlap length between the second connecting portion and the first connecting portion along the circumferential direction of the decorative component body is greater than or equal to 10 mm.

[0018] By keeping the overlap length between the second connecting part and the first connecting part within the above range, it can be ensured that there is a suitable connection area between the camera decorative part and the back cover, which is conducive to improving the connection strength between the camera decorative part and the back cover, enhancing the fit stability between the camera decorative part and the back cover, and effectively avoiding the situation of unstable connection due to insufficient overlap length.

[0019] In one possible implementation, the thickness of the first connecting portion is 0.3mm-0.7mm.

[0020] By setting the thickness of the first connecting part within the above-mentioned range, the strength of the back cover can be further enhanced, the quality of the back cover can be improved, and the resistance to deformation of the back cover can be increased.

[0021] In one possible implementation, the camera trim is a one-piece structure.

[0022] Understandably, the integrated structure results in fewer parts for the camera trim, eliminating the need for internal assembly processes. This simplifies the manufacturing process and improves production and assembly efficiency.

[0023] In one possible implementation, the decorative element body includes an outer surface portion and a baffle. The outer surface portion is located outside the cover and abuts against the cover. The outer surface portion has a cavity with an opening on the surface of the outer surface portion facing the cover. The baffle is connected to the outer surface portion and located at the edge of the opening of the cavity. The baffle extends along the circumferential direction of the cavity and passes through the mounting hole. One end of the baffle away from the decorative element body is connected to the second connecting portion. The baffle, the outer surface portion, and the second connecting portion cooperate to form the slot.

[0024] By setting a baffle on the decorative part body, the decorative part body can form a slot with the second connecting part, thereby providing conditions for the camera decorative part to be snapped into the back cover.

[0025] In one possible implementation, the end of the first connecting portion away from the cover has a gap with the baffle.

[0026] By creating a circumferential gap between the baffle and the first connecting part, a certain amount of space can be provided to prevent the camera decorative part from deforming during installation, effectively preventing the camera decorative part from falling off due to force along the thickness direction of the back cover assembly after the camera decorative part and the back cover are assembled.

[0027] In one possible implementation, the rear cover assembly further includes a sealant layer, wherein one side of the sealant layer is connected to the cover body and a plurality of first connecting portions in the thickness direction of the sealant layer, and the other side of the sealant layer is connected to a plurality of second connecting portions; the sealant layer is also connected to the baffle.

[0028] It is understood that in the embodiments of this application, when setting the sealant layer, liquid adhesive is first poured into the gap between the back cover and the camera trim, allowing the liquid adhesive to fully penetrate all gaps between the back cover and the camera trim. After the liquid adhesive cures, a solid sealant layer is formed. This method of setting the sealant layer allows one side of the sealant layer to connect to the cover and multiple first connecting parts, and the other side of the sealant layer to connect to multiple second connecting parts. This facilitates a sealed connection between the back cover and the camera trim, achieving waterproofing of the back cover assembly and improving the connection stability between the back cover and the camera trim. Furthermore, before the sealant layer cures, the liquid adhesive is prone to overflowing onto the outside of the back cover assembly due to excessive usage or shaking of the back cover assembly, affecting the aesthetics of the electronic device. Therefore, by connecting the sealant layer to the baffle, it is possible to prevent adhesive from overflowing onto the outside of the back cover assembly.

[0029] In one possible implementation, the thickness of the sealant layer is less than or equal to 0.15 mm. By setting the thickness of the sealant layer within this range, a certain amount of space can be freed up in the thickness direction of the entire device while ensuring waterproofing. This not only provides tolerance space for the installation of other structures in the electronic device, avoiding assembly errors and mistakes caused by interference between components during assembly, but also improves the assembly efficiency of the electronic device. Furthermore, it adapts to the trend of thinner and lighter electronic devices.

[0030] In one possible implementation, the cover includes a main body and a protrusion connected to each other. The main body includes a first surface and a second surface disposed opposite to each other. The first surface faces the outer surface. The protrusion protrudes from the first surface toward the outer surface and is recessed from the second surface toward the outer surface. The protrusion abuts against the outer surface. The mounting hole is located on the protrusion and penetrates the protrusion along its thickness direction.

[0031] The protrusion and the main body form a mounting groove, the mounting groove is coaxially arranged and connected with the mounting hole, and the sealant layer and the plurality of second connecting parts are all located in the mounting groove.

[0032] Understandably, by providing protrusions on the back cover, the strength of the back cover can be increased, the pressure applied to the back cover can be distributed, and the possibility of deformation of the back cover can be reduced. Mounting grooves can form partial receiving cavities for electronic devices, used to house the electronic device's components.

[0033] In one possible implementation, the protrusion is provided with a groove and an overflow groove. The opening of the groove is located on the surface of the protrusion away from the main body. The groove is coaxially arranged and connected with the mounting hole. The opening of the overflow groove is located on the bottom wall of the groove. The overflow groove is connected to the groove and surrounds the mounting hole.

[0034] The grooves provide a margin of error, preventing unstable connections caused by assembly errors when assembling the camera trim and back cover. The adhesive overflow grooves act as a buffer for liquid adhesive, reducing the possibility of it spilling onto the outside of the electronic device.

[0035] Secondly, this application also provides an electronic device, the electronic device including a display module, a middle frame and a back cover assembly as described above, the display module and the back cover assembly being respectively connected to both sides of the middle frame in the thickness direction, the display module, the middle frame and the back cover assembly surrounding to form a receiving cavity of the electronic device. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0037] Figure 2 This is a schematic diagram of a back cover assembly provided in an embodiment of this application;

[0038] Figure 3 yes Figure 2 The diagram shows an exploded view of the back cover assembly.

[0039] Figure 4 This is a schematic diagram of a portion of the back cover structure provided in an embodiment of this application from one angle.

[0040] Figure 5 This is a schematic diagram of a portion of the back cover structure provided in an embodiment of this application from another angle;

[0041] Figure 6 It is along Figure 4 A cross-sectional schematic diagram of a portion of the back cover structure obtained by cutting along section line AA as shown.

[0042] Figure 7 It is along Figure 2 A schematic cross-sectional view of the back cover assembly obtained by cutting along section line BB;

[0043] Figure 8 yes Figure 7 A magnified view of region C in the middle;

[0044] Figure 9 This is a schematic diagram of the camera decorative component provided in an embodiment of this application from one angle;

[0045] Figure 10 This is a structural schematic diagram of the camera decorative component provided in an embodiment of this application from another angle;

[0046] Figure 11 This is a structural schematic diagram of the camera decorative component provided in an embodiment of this application from another angle;

[0047] Figure 12 yes Figure 2 The diagram shown illustrates one state of the back cover assembly after assembly.

[0048] Figure 13 yes Figure 2 The diagram shown illustrates one state of the back cover assembly during the assembly process.

[0049] Figure 14 This is a schematic diagram of the adhesive component provided in an embodiment of this application at one angle;

[0050] Figure 15 It is along Figure 14 A schematic cross-sectional view of the adhesive obtained by cutting along the cutting line DD shown.

[0051] Figure 16 This is another structural schematic diagram of the back cover assembly provided in the embodiments of this application;

[0052] Figure 17 This is a schematic diagram of the sealant layer provided in an embodiment of this application at one angle. Detailed Implementation

[0053] For ease of understanding, the terminology used in the embodiments of this application will be explained first.

[0054] And / or: This is simply a way of describing the relationship between related objects. It indicates that there can be three kinds of relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0055] Multiple: Unless otherwise specified, multiple means two or more.

[0056] Connection: should be interpreted broadly. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through an intermediary.

[0057] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0058] Embodiments of this application provide a back cover assembly and an electronic device.

[0059] The electronic devices can include, but are not limited to, mobile phones, tablets, laptops, wearable devices, etc. Wearable devices can include, but are not limited to, smartwatches, smart bracelets, health monitoring devices, smart glasses, VR (Virtual Reality) glasses, AR (Augmented Reality) glasses, etc.

[0060] The following text will use a mobile phone as an example to explain the structure of electronic devices, but it should be understood that this is not the only way to describe it.

[0061] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an electronic device 200 provided in an embodiment of this application.

[0062] For ease of description, the length direction of the electronic device 200 is defined as the X direction, the width direction as the Y direction, and the thickness direction as the Z direction. The X, Y, and Z directions are all perpendicular to each other.

[0063] Electronic device 200 may include a display module 210, a mid-frame 220, a back cover assembly 100, and a camera module (not shown). The display module 210 and the back cover assembly 100 may be connected to both sides of the mid-frame 220 in the thickness direction (Z direction in the figure). The display module 210, the mid-frame 220, and the back cover assembly 100 may form a receiving cavity for electronic device 200. The receiving cavity is capable of accommodating multiple modules, multiple electronic devices, and multiple structural components that perform various functions of electronic device 200. The camera module may be mounted on the back cover assembly 100 and is at least partially located within the receiving cavity.

[0064] For example, when the electronic device 200 is a mobile phone, the display module 210 faces the user and can be a cover plate that displays visual information such as images, colors, and text to the user. The back cover assembly 100 faces away from the user and can be the battery cover of the mobile phone. The back cover assembly 100 can be a one-piece molded cover plate or a cover plate assembled from multiple parts. The camera module can be the rear camera of the electronic device 200. As the thickness of the electronic device 200 becomes thinner, the camera module can be partially located within the receiving cavity and partially protruding from the back cover assembly 100.

[0065] It should be noted that, Figure 1 The purpose is merely to illustratively illustrate the connection relationship between the display module 210, the mid-frame 220, and the back cover assembly 100, and is not to specifically limit the connection positions, specific structures, or quantities of each device. Furthermore, the structures illustrated in the embodiments of this application do not constitute a specific limitation on the electronic device 200. In other embodiments of this application, the electronic device 200 may include... Figure 1 This may involve more or fewer components, or combining certain components, or splitting certain components, or different component arrangements. Figure 1 The components shown can be implemented in hardware, software, or a combination of both.

[0066] Please refer to the following: Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of a structure of the back cover assembly 100 provided in an embodiment of this application. Figure 3 yes Figure 2 The diagram shows an exploded view of the back cover assembly 100.

[0067] The back cover assembly 100 may include a back cover 10, a camera trim 20, and multiple adhesive pieces 30. The back cover 10 may have mounting holes 11. The mounting holes 11 may extend through the back cover 10 along its thickness direction (Z direction in the diagram). The camera trim 20 may be installed in the mounting holes 11 of the back cover 10 and provide support and protection for the camera module. Multiple adhesive pieces 30 may be spaced apart between the back cover 10 and the camera trim 20 to securely connect the back cover 10 and the camera trim 20.

[0068] For example, the material of the back cover 10 can be, but is not limited to, polyurethane (PU), glass, etc. The mounting hole 11 can be located on the top of the back cover 10. The shape of the mounting hole 11 can be triangular, square, circular, polygonal, irregular, etc. The embodiments of this application do not impose strict limitations on the shape, location, size, and other characteristic parameters of the mounting hole 11.

[0069] Please refer to the following: Figure 4 , Figure 5 and Figure 6 , Figure 4 This is a schematic diagram of a portion of the structure of the back cover 10 provided in an embodiment of this application, taken at one angle. Figure 5 This is a schematic diagram of a portion of the structure of the back cover 10 provided in an embodiment of this application from another angle. Figure 6 It is along Figure 4 The diagram shows a cross-sectional view of a portion of the structure of the back cover 10 obtained by cutting along section line AA.

[0070] The rear cover 10 may include a cover body 12 and a plurality of first connecting portions 13. The cover body 12 may have the mounting holes 11 described above. The mounting holes 11 may penetrate the cover body 12 along its thickness direction (Z direction in the figure). The cover body 12 may be a generally flat structure. Alternatively, the cover body 12 may also be a structure with protruding portions. The following description will use the example of a cover body 12 with protruding portions to illustrate the cover body 12.

[0071] The cover 12 may include a main body 121 and a protrusion 122. The main body 121 is connected to the outer edge of the protrusion 122. The protrusion 122 protrudes outward relative to the main body 121 in a direction toward the outside of the electronic device 200. The protrusion 122 can strengthen the back cover 10, distribute the pressure applied to the back cover 10, and reduce the possibility of deformation of the back cover 10.

[0072] The protrusion 122 and the main body 121 can be connected to form an integral structure. That is, the cover 12 is an integral structure. For example, the protrusion 122 and the main body 121 can be connected to form an integral structure by means such as integral molding. Alternatively, the protrusion 122 and the main body 121 can be separately disposed and fixed together by assembly. That is, the cover 12 is an assembled structure. For example, the protrusion 122 and the main body 121 can be fixed together by assembly methods such as welding, bonding, screwing, or snap-fitting.

[0073] The main body 121 may include a first surface 121a and a second surface 121b. The second surface 121b and the first surface 121a may be disposed opposite to each other in the thickness direction (Z direction in the figure) of the main body 121. The first surface 121a faces the outside of the electronic device 200. The second surface 121b faces the receiving cavity of the electronic device 200. That is, the first surface 121a is the outer surface of the main body 121, and the second surface 121b is the inner surface of the main body 121.

[0074] Please continue reading. Figure 4 , Figure 5 and Figure 6 The protrusion 122 can be fixedly connected to the main body 121. The protrusion 122 can be configured to protrude outward from the first surface 121a relative to the electronic device 200, and recessed outward from the second surface 121b relative to the electronic device 200. The protrusion 122 can include a connecting surface 1221. The connecting surface 1221 is the surface of the protrusion 122 facing away from the main body 121. The distance between the connecting surface 1221 and the first surface 121a of the main body 121 in the thickness direction of the back cover 10 is the protrusion height of the protrusion 122 relative to the main body 121. The protrusion height of the protrusion 122 relative to the first surface 121a and the recess depth of the protrusion 122 relative to the second surface 121b can be selected according to the actual application scenario, and there is no strict limitation on this. For example, the protrusion 122 can be located at the top of the main body 121.

[0075] The protrusion 122 may be provided with the mounting hole 11 described above. The mounting hole 11 may penetrate the protrusion 122 along the thickness direction (Z direction in the figure). The mounting hole 11 may be provided in the central region of the protrusion 122, and the central axis of the mounting hole 11 may coincide with the central axis of the protrusion 122. The mounting hole 11 may also penetrate the connecting surface 1221.

[0076] The protrusion 122 may have a groove 1222. The opening of the groove 1222 is located on the connecting surface 1221. The groove 1222 may be formed by recessing from the connecting surface 1221 into the interior of the protrusion 122. The groove 1222 may be coaxially arranged and connected with the mounting hole 11. The opening area of ​​the groove 1222 may be larger than the opening area of ​​the mounting hole 11.

[0077] Please refer to the following: Figure 5 and Figure 6 The protrusion 122 may also be provided with an overflow groove 1223. The opening of the overflow groove 1223 may be located on the bottom wall of the groove 1222. The bottom wall of the groove 1222 and the opening of the groove 1222 may be positioned opposite each other in the thickness direction of the protrusion 122. The overflow groove 1223 may be formed by recessing from the bottom wall of the groove 1222 into the interior of the protrusion 122. The overflow groove 1223 may communicate with the groove 1222. The overflow groove 1223 also surrounds the mounting hole 11 and is spaced apart from the mounting hole 11. That is, the overflow groove 1223 may extend along the circumferential direction of the protrusion 122 and surround the outside of the mounting hole 11.

[0078] In the embodiments of this application, the protrusion 122 and the main body 121 can form a mounting groove 123. The opening of the mounting groove 123 is located on the second surface 121b of the main body 121. The mounting groove 123 can be recessed from the second surface 121b of the main body 121 toward the interior of the main body 121 and the interior of the protrusion 122. The mounting groove 123 can be coaxially arranged and connected with the mounting hole 11. That is, the mounting hole 11 can connect the mounting groove 123 and the recess 1222. The mounting groove 123 can form a partial receiving cavity of the electronic device 200. One opening of the mounting hole 11 can be located on the connecting surface 1221. The other opening of the mounting hole 11 is located on the bottom wall of the mounting groove 123. The opening of the mounting groove 123 can be arranged opposite to the bottom wall of the mounting groove 123 in the thickness direction of the cover 12. The recess depth of the mounting groove 123 relative to the second surface 121b can be selected according to the actual application scenario and is not strictly limited. For example, the protrusion 122 can be located on the top of the main body 121.

[0079] Please refer to the following: Figure 4 , Figure 5 and Figure 6 Multiple first connecting parts 13 can be spaced apart on the inner wall of the mounting hole 11 along the circumferential direction of the mounting hole 11 of the cover 12 to achieve a fixed connection between the multiple first connecting parts 13 and the cover 12. The circumferential direction of the mounting hole 11 is the direction around the central axis of the mounting hole 11.

[0080] The multiple first connecting parts 13 and the cover body 12 can be connected to form an integral structure. That is, the rear cover 10 is an integral structure. For example, the multiple first connecting parts 13 and the cover body 12 can be connected to form an integral structure by means such as integral molding. Alternatively, the multiple first connecting parts 13 and the cover body 12 can be separately arranged and fixed together by assembly. That is, the rear cover 10 is an assembled structure. For example, the multiple first connecting parts 13 and the cover body 12 can be fixed together by assembly methods such as welding, bonding, screwing, or snap-fitting.

[0081] In embodiments of this application, the number of first connecting portions 13 may be at least two. The structures of the at least two first connecting portions 13 may be similar, identical, or different. The at least two first connecting portions 13 may be equally spaced along the circumferential direction of the mounting hole 11. Alternatively, the at least two first connecting portions 13 may be unequally spaced along the circumferential direction of the mounting hole 11. Exemplarily, the number of first connecting portions 13 may be two, three, four, five, six, or more than six.

[0082] It is understandable that by keeping the number of first connecting parts 13 within the aforementioned range, the force applied to the back cover 10 can be distributed, making the force on the back cover 10 more even. Furthermore, it ensures that even if one of the first connecting parts 13 fails, the other first connecting parts 13 can still guarantee the strength of the back cover 10, thereby improving the overall structural stability and durability of the back cover 10.

[0083] The maximum dimension of the first connecting portion 13 along the circumferential direction of the mounting hole 11 can be greater than the maximum dimension of the first connecting portion 13 along the radial direction of the mounting hole 11. For example, the maximum dimension of the first connecting portion 13 along the radial direction of the mounting hole 11 can be 2 mm.

[0084] It is understandable that by making the maximum dimension of the first connecting part 13 in the circumferential direction of the mounting hole 11 greater than the maximum dimension of the first connecting part 13 in the radial direction of the mounting hole 11, not only can there be sufficient connection area between the first connecting part 13 and the inner wall of the mounting hole 11, ensuring the connection stability and reliability between the first connecting part 13 and the cover 12, but it can also occupy as little space in the radial direction of the mounting hole 11 as possible, so as to avoid interference with other components of the electronic device 200 installed in the mounting hole 11 (such as the camera decorative part 20, camera module, etc.).

[0085] Please see Figure 6 The thickness H1 of the first connecting portion 13 can be 0.3mm-0.7mm (including the endpoint values ​​of 0.3mm and 0.7mm). For example, the thickness H1 of the first connecting portion 13 can be 0.4mm. The first connecting portion 13 can be formed by a partial extrusion process. That is, the first connecting portion 13 can be formed by partially extruding the back cover 10.

[0086] It is understandable that by setting the thickness H1 of the first connecting part 13 within the above-mentioned range, the strength of the back cover 10 can be further enhanced, the mass of the back cover 10 can be improved, and the deformation resistance of the back cover 10 can be increased.

[0087] Please see Figure 5In the embodiments of this application, a notch 14 may be formed between two adjacent first connecting portions 13. That is, the first connecting portions 13 and notches 14 may be alternately arranged in the circumferential direction of the mounting hole 11. The minimum extension length of the notch 14 along the circumferential direction of the mounting hole 11 may be a first length L1.

[0088] The first length L1 can be greater than, less than, or equal to the maximum dimension of the first connecting portion 13 along the circumferential direction of the mounting hole 11. Multiple first connecting portions 13 can form multiple notches 14. The number of notches 14 can be the same as the number of first connecting portions 13, and at least two. The structures of the multiple notches 14 can be similar, identical, or different.

[0089] In one possible application scenario, such as Figure 5 As shown, the number of first connecting parts 13 can be six. The six first connecting parts 13 are spaced apart along the circumferential direction of the mounting hole 11 and are located at six equal division points on the inner wall of the mounting hole 11. The number of notches 14 formed between the six first connecting parts 13 is also six. The six first connecting parts 13 and the six notches 14 are located at twelve equal division points on the inner wall of the mounting hole 11, to better ensure a stable fit between the first connecting parts 13 and the cover 12.

[0090] Please refer to the following: Figure 7 , Figure 8 and Figure 9 , Figure 7 It is along Figure 2 The diagram shows a cross-sectional view of the rear cover assembly 100 obtained by cutting along section line BB. Figure 8 yes Figure 7 A magnified view of region C in the middle. Figure 9 This is a schematic diagram of the camera decoration 20 provided in an embodiment of this application from one angle.

[0091] The camera decorative piece 20 can be installed in the mounting hole 11 of the back cover 10 and clamp multiple first connecting portions 13 and part of the cover body 12 of the back cover 10 to achieve a fixed connection between the camera decorative piece 20 and the back cover 10. The camera decorative piece 20 may include a decorative piece body 21 and multiple second connecting portions 22. The decorative piece body 21 may include a first end 211 and a second end 212. The first end 211 and the second end 212 may be arranged opposite to each other in the thickness direction (Z direction in the figure). The first end 211 may be the end of the decorative piece body 21 facing the outside of the electronic device 200, and the second end 212 may be the end of the decorative piece body 21 facing the inside of the electronic device 200 (i.e., facing the receiving cavity). The first end 211 may be located on the outside of the cover body 12 of the back cover 10, with the decorative piece body 21 passing through the mounting hole 11, and the second end 212 may be located on the inside of the cover body 12 of the back cover 10. That is, the first end 211 may be located on the outside of the electronic device 200. The second end 212 can be located within the receiving cavity of the electronic device 200. Specifically, the second end 212 can be located within the mounting groove 123 of the cover 12.

[0092] Please refer to the following: Figure 8 , Figure 9 and Figure 10 , Figure 10 This is a structural schematic diagram of the camera decoration 20 provided in an embodiment of this application from another angle.

[0093] The decorative element body 21 may include an outer surface portion 213 and a baffle 214. The outer surface portion 213 may be located on the outside of the cover 12 of the rear cover 10. That is, the outer surface portion 213 may be located outside the electronic device 200. The outer surface portion 213 may also abut against the cover 12 of the rear cover 10 to ensure that there is a certain contact area between the camera decorative element 20 and the rear cover 10, thereby enhancing the connection strength between the camera decorative element 20 and the rear cover 10. The end of the outer surface portion 213 facing the outside of the electronic device 200 is the first end 211 of the decorative element body 21, and the surface of the outer surface portion 213 facing the cover 12 of the rear cover 10 abuts against the surface of the protrusion 122 that faces away from the body 121.

[0094] The outer surface portion 213 may have a cavity 2131 and a receiving groove 2132. The opening of the cavity 2131 may be located on the surface of the outer surface portion 213 facing the cover 12 of the rear cover 10. The cavity 2131 may be recessed from the surface of the outer surface portion 213 facing the cover 12 toward the interior of the outer surface portion 213. The cavity 2131 may communicate with the mounting groove 123 of the rear cover 10. That is, the cavity may communicate with the receiving cavity of the electronic device 200. The cavity 2131 may be used to accommodate a camera module. The opening of the receiving groove 2132 may be located on the end face of the outer surface portion 213 facing the exterior of the electronic device 200. The receiving groove 2132 may be recessed from the end face of the outer surface portion 213 facing the exterior of the electronic device 200 toward the interior of the outer surface portion 213 and communicate with the cavity. The receiving groove 2132 may be used to install decorative parts.

[0095] The baffle 214 can be connected to the surface of the outer part 213 facing the cover 12 of the rear cover 10, and protrudes towards the cover 12 relative to the surface of the outer part 213 facing the cover 12. The baffle 214 can extend in the circumferential direction of the cavity 2131 and surround the outer edge of the opening of the cavity 2131. That is, the baffle 214 can be annular. The baffle 214 can be arranged substantially perpendicular to the surface of the outer part 213 facing the cover 12. The baffle 214 can pass through the mounting hole 11 of the rear cover 10, and the end of the baffle 214 away from the decorative body 21 is located in the mounting groove 123 of the cover 12. The end of the baffle 214 away from the outer part 213 is the second end 212 of the decorative body 21.

[0096] Please refer to the following: Figure 8 , Figure 10 and Figure 11 , Figure 11 This is a structural schematic diagram of the camera decoration 20 provided in an embodiment of this application from another angle.

[0097] Multiple second connecting portions 22 are connected to the second end 212 of the decorative body 21 and are all located inside the cover 12 of the rear cover 10. The multiple second connecting portions 22 can be spaced apart along the circumferential direction of the decorative body 21. The circumferential direction of the decorative body 21 is the direction surrounding the central axis of the decorative body 21. Specifically, each second connecting portion 22 is connected to the end of the baffle 214 of the decorative body 21 away from the outer appearance portion 213 and is located within the mounting groove 123 of the cover 12 of the rear cover 10, i.e., within the receiving cavity of the electronic device 200. The projection of each second connecting portion 22 along the thickness direction (Z direction in the figure) of the camera decorative piece 20 can fall into the decorative body 21. That is, in the thickness direction of the camera decorative piece 20, the multiple second connecting portions 22 can be covered by the decorative body 21.

[0098] The decorative body 21 and the multiple second connecting portions 22 can be connected to form an integrated structure. That is, the camera decorative part 20 can be an integrated structure. Exemplarily, the decorative body 21 and the multiple second connecting portions 22 can be connected to form an integrated structure by means such as integral molding. In other embodiments, the decorative body 21 and the multiple second connecting portions 22 can also be separately arranged and fixed together by assembly. That is, the camera decorative part 20 is an assembled structure. Exemplarily, the decorative body 21 and the multiple second connecting portions 22 can be fixed together by assembly methods such as welding, bonding, screwing, snap-fitting, etc.

[0099] Understandably, the integrated structure of the camera decorative part 20 has fewer parts, eliminating the need for internal assembly processes, which simplifies the manufacturing process and improves the production and assembly efficiency of the camera decorative part 20.

[0100] In the embodiments of this application, each second connecting portion 22 can be configured with the decorative body 21 to form a slot 23. Specifically, each second connecting portion 22 can cooperate with the baffle 214 and the outer surface portion 213 to form a slot 23. A slot 23 can clamp one of the first connecting portions 13 of the back cover 10. The surface of the second connecting portion 22 facing the outer surface portion 213 and the surface of the outer surface portion 213 facing the cover body 12 of the back cover 10 respectively form two sidewalls of the slot 23. The outer peripheral surface of the baffle 214 forms the bottom wall of the slot 23, wherein the outer peripheral surface of the baffle 214 is the outer surface surrounding the central axis of the baffle 214.

[0101] The bottom wall of the slot 23 can have a gap D1 between it and the end of the first connecting portion 13 of the rear cover 10 away from the cover body 12. That is, there is a gap D1 between the outer peripheral surface of the baffle 214 and the end of the first connecting portion 13 of the rear cover 10 away from the cover body 12. It can be understood that by making a circumferential gap between the baffle 214 and the first connecting portion 13, a certain amount of anti-deformation space can be provided for the camera decorative part 20, effectively preventing the camera decorative part 20 from falling off due to the force along the thickness direction (Z direction in the figure) of the rear cover assembly 100 after the camera decorative part 20 and the rear cover 10 are assembled.

[0102] The distance of gap D1 can range from 0.1mm to 0.4mm (including the endpoint values ​​of 0.1mm and 0.4mm). For example, the distance of gap D1 can be 0.2mm.

[0103] In the embodiments of this application, the number of second connecting portions 22 may be the same as the number of first connecting portions 13, and at least two. At least two second connecting portions 22 are spaced apart along the circumferential direction of the decorative body 21. The number of slots 23 formed by the at least two second connecting portions 22 may also be the same as the number of second connecting portions 22, and at least two. At least two slots 23 are spaced apart along the circumferential direction of the decorative body 21.

[0104] In one possible application scenario, please refer to the relevant documentation. Figure 10 and Figure 11 The number of second connecting parts 22 can be six. The six second connecting parts 22 can be spaced apart along the circumferential direction of the decorative body 21 and are respectively located at six equal division points of the decorative body 21. The number of slots 23 formed by the six second connecting parts 22 and the decorative body 21 is also six.

[0105] Please refer to the following: Figure 11 and Figure 12 , Figure 12 yes Figure 2 The diagram shows a state of the back cover assembly 100 when it is fully assembled.

[0106] In the embodiments of this application, the overlap length between a second connecting portion 22 and a first connecting portion 13 along the circumferential direction of the decorative body 21 can be greater than or equal to 10 mm. That is, the dimension of the connection area between the second connecting portion 22 and the first connecting portion 13 along the circumferential direction of the decorative body 21 is greater than or equal to 10 mm.

[0107] The dimension of the second connecting portion 22 along the circumferential direction of the decorative body 21 can be greater than, equal to, or less than the dimension of the first connecting portion 13 along the circumferential direction of the mounting hole 11. There are no restrictions on the dimensional relationship between the second connecting portion 22 and the first connecting portion 13, as long as the overlap length of the second connecting portion 22 and the first connecting portion 13 along the circumferential direction of the decorative body 21 is greater than or equal to 10mm.

[0108] It is understandable that by keeping the overlap length between the second connecting part 22 and the first connecting part 13 within the above range, it can be ensured that there is a suitable connection area between the camera decorative part 20 and the back cover 10, which is conducive to improving the connection strength between the camera decorative part 20 and the back cover 10, enhancing the fit stability between the camera decorative part 20 and the back cover 10, and effectively avoiding the situation of unstable connection due to insufficient overlap length.

[0109] Please refer to the following: Figure 11 , Figure 12 and Figure 13 , Figure 13 yes Figure 2The diagram shows a state of the back cover assembly 100 during the assembly process.

[0110] The maximum extension length of the second connecting portion 22 along the circumferential direction of the decorative body 21 can be a second length L2. The second length L2 can be less than or equal to the first length L1 of the notch 14 of the back cover 10.

[0111] It is understandable that, since the second length L2 of the second connecting portion 22 along the circumferential direction of the decorative body 21 is less than or equal to the first length L1 of the notch 14 along the circumferential direction of the mounting hole 11, when assembling the camera decorative part 20 with the back cover 10, each second connecting portion 22 of the camera decorative part 20 can be aligned with a notch 14 of the back cover 10 and inserted into a notch 14 of the back cover 10 (e.g., ...). Figure 13 (As shown), then rotate the camera trim 20 clockwise or counterclockwise so that each of the first connecting parts 13 of the back cover 10 is correspondingly engaged in a slot 23 of the camera trim 20 (as shown). Figure 12 As shown), the camera decorative part 20 and the back cover 10 are assembled, so that the first connecting part 13 can be inserted into the slot 23 by rotating the assembly.

[0112] This rotary assembly method allows the second connecting portion 22 of the camera decorative piece 20 to be fully inserted into the notch 14 of the back cover 10, making subsequent rotation operations more convenient and precise. The method is simple, efficient, and simplifies the assembly process of the back cover assembly 100, improving production efficiency. Furthermore, even if the camera decorative piece 20 is designed as a one-piece structure, the first connecting portion 13 of the back cover 10 can be rotated into the slot 23 of the camera decorative piece 20, effectively avoiding the assembly difficulties that arise when the camera decorative piece 20 is a one-piece structure. In other words, the technical solution of this application is applicable not only to one-piece structures of the camera decorative piece 20 but also to split structures.

[0113] In related technologies, back cover assemblies are mostly designed with a sandwich structure, consisting of an inner camera trim piece, a back cover, and an outer camera trim piece. The inner and outer camera trim pieces are fixed to the back cover using screws. However, during the assembly of the back cover assembly, precise alignment of the positional relationships between the inner and outer camera trim pieces, and between the back cover and both the inner and outer camera trim pieces, is required. Furthermore, multiple screws need to be installed inside the back cover assembly. This makes the assembly process complex and significantly reduces production efficiency.

[0114] Therefore, in the embodiments of this application, by connecting the plurality of second connecting portions 22 of the camera decorative piece 20 to the plurality of first connecting portions 13 of the back cover 10 respectively, the fixed connection between the camera decorative piece 20 and the back cover 10 is achieved. This eliminates the need for the screw assembly process in related technologies, further reducing the assembly cost and weight of the back cover assembly 100. That is, in the embodiments of this application, only the camera decorative piece 20 and the back cover 10 need to be assembled, greatly simplifying the assembly process of the back cover assembly 100.

[0115] Please refer to the following: Figure 8 and Figure 14 , Figure 14 This is a schematic diagram of the adhesive 30 provided in an embodiment of this application at one angle. Figure 14 In this diagram, the shape of the adhesive 30 is for illustrative purposes only and does not constitute a limitation on the actual shape of the adhesive 30.

[0116] Each adhesive component 30 is located within a slot 23 and connected between a first connecting portion 13 and a second connecting portion 22. The number of adhesive components 30 is equal to the number of the first connecting portions 13 and / or the second connecting portions 22, and is at least two. At least two adhesive components 30 are spaced apart along the circumferential direction of the camera decorative component 20.

[0117] It is understandable that by providing the adhesive 30 in the back cover assembly 100, the first connecting part 13 and the second connecting part 22 can be fixedly connected, thereby achieving a fixed connection between the back cover 10 and the camera decorative part 20. Furthermore, the adhesive 30 can also prevent the first connecting part 13 and the second connecting part 22 from moving along the circumferential direction of the mounting hole 11, i.e., from rotational misalignment, which helps to enhance the connection stability between the first connecting part 13 and the second connecting part 22.

[0118] The thickness of the adhesive component 30 can be 0.15mm-0.35mm (including the endpoint values ​​of 0.15mm and 0.35mm). It can be understood that by setting the thickness of the adhesive component 30 within the above range, the thickness of the adhesive component 30 can be reduced as much as possible while ensuring the bonding strength of the adhesive component 30, thereby reducing the protrusion thickness of the camera decorative component 20 relative to the back cover 10.

[0119] Please refer to the following: Figure 14 and Figure 15 , Figure 15 It is along Figure 14 The diagram shows a cross-sectional view of the adhesive component 30 obtained by cutting along the cutting line DD.

[0120] Each adhesive component 30 may include a first adhesive layer 31, a second adhesive layer 32, and an intermediate layer 33. The first adhesive layer 31 and the second adhesive layer 32 may be connected to both sides of the intermediate layer 33 in the thickness direction (Z direction in the figure). That is, the first adhesive layer 31, the second adhesive layer 32, and the intermediate layer 33 are stacked sequentially. The first adhesive layer 31 may be connected to the first connecting portion 13 of the back cover 10. The material of the first adhesive layer 31 may be a self-adhesive material. A self-adhesive material is a material that has self-adhesive properties and can adhere to other surfaces without external force. The second adhesive layer 32 may be connected to the second connecting portion 22 of the camera decorative component 20. The material of the second adhesive layer 32 is a material that can only adhere to other surfaces when preset conditions are met. That is, the second adhesive layer 32 is not adhesive when the preset conditions are not met, and it can only be connected to the second connecting portion 22 of the camera decorative component 20 when the preset conditions are met. The material of the intermediate layer 33 can be polyethylene terephthalate (PET), polycarbonate (PC), etc.

[0121] Understandably, by designing the first adhesive layer 31 of the adhesive component 30 as a conventional adhesive layer and the second adhesive layer 32 as a special adhesive layer, the adhesive component 30 can be initially attached only to the first connecting part 13 of the back cover 10. The other side is not adhesive before assembly, but becomes adhesive after assembly. This effectively prevents the adhesive component 30 from sticking to the edge of the camera decorative part 20 due to its own adhesiveness during the rotation assembly process, thus avoiding the problem of hindering the rotation assembly.

[0122] Furthermore, in the back cover components of related technologies, the inner and outer camera decorative parts are generally separate structures. As camera functions become more powerful and performance improves, the size of the camera also increases. This leads to a significant protrusion of the camera decorative parts fixed to the back cover, greatly affecting the aesthetics of the electronic device, as well as its overall cost and grip experience.

[0123] In the embodiments of this application, by setting the camera trim 20 as an integral structure, the screws required for assembling the inner and outer camera trims 20 in the back cover assembly 100 are eliminated, avoiding the additional space occupied by component assembly, thereby reducing the protruding thickness of the camera trim 20 and the thickness of the electronic device 200. Furthermore, since the adhesive 30 is equivalent to pre-fixed adhesive, compared to the fixing adhesive in related technologies, the amount and thickness of adhesive used in the back cover assembly 100 can be reduced, which not only reduces the Z-axis stacking space of the camera trim 20 but also reduces the protrusion height of the camera trim 20 from the back cover 10.

[0124] For example, the adhesive 30 can reduce the Z-axis stacking space by approximately 0.1 mm compared to the adhesive backing in related technologies, and can save more than 0.5 mm of Z-axis space at local bottleneck locations. For instance, by replacing the 0.25 mm thick adhesive backing used in conventional internal camera trim with the 0.15 mm thick adhesive 30, the protrusion thickness of the camera trim 20 can be reduced by 0.1 mm.

[0125] In one possible implementation, the material of the second adhesive layer 32 can be a hot melt material or a photosensitive material.

[0126] When the material of the second adhesive layer 32 is a hot melt material, the second adhesive layer 32 is not tacky at room temperature and needs to be heated to a certain temperature to become tacky. For example, the material of the second adhesive layer 32 can be a hot melt adhesive. Hot melt adhesive can become tacky by heating to 60°C and holding for 2 minutes.

[0127] When the material of the second adhesive layer 32 is a photosensitive material, the second adhesive layer 32 only becomes adhesive under light stimulation. For example, the material of the second adhesive layer 32 can be an ultraviolet (UV) adhesive. In this case, the second adhesive layer 32 only becomes adhesive after being exposed to ultraviolet light for a certain period of time.

[0128] Please refer to the following: Figure 16 and Figure 17 , Figure 16 This is another structural schematic diagram of the back cover assembly 100 provided in the embodiments of this application. Figure 17 This is a schematic diagram of the structure of the sealant layer 40 at one angle provided in an embodiment of this application.

[0129] The back cover assembly 100 may further include a sealant layer 40. Along the thickness direction (Z direction in the illustration), one side of the sealant layer 40 may connect to the cover body 12 of the back cover 10 and a plurality of first connecting portions 13, and the other side of the sealant layer 40 may connect to a plurality of second connecting portions 22 of the camera trim 20. The sealant layer 40 is also connected to the baffle 214 of the camera trim 20.

[0130] Specifically, the sealant layer 40 can be located within the mounting groove 123 of the back cover 10 and the slot 23 of the camera trim 20, and is connected to the surface of the protrusion 122 of the cover 12 facing the main body 121, the surface of each first connecting portion 13 of the cover 12 facing the main body 121, the surface of each second connecting portion 22 of the camera trim 20 facing the protrusion 122 of the cover 12, and the outer peripheral surface of the baffle 214 of the camera trim 20. The sealant layer 40 can extend along the circumferential direction of the camera trim 20. The circumferential direction of the camera trim 20 is the direction surrounding the central axis of the camera trim 20. That is, the sealant layer 40 can be annular. The sealant layer 40 can also be connected to multiple adhesive pieces 30.

[0131] It is understood that in the embodiments of this application, when setting the sealant layer 40, liquid adhesive is first poured into the gap between the back cover 10 and the camera decorative part 20, so that the liquid adhesive can fully enter all the gaps between the back cover 10 and the camera decorative part 20. After the liquid adhesive cures, a solid sealant layer 40 is formed. This method of setting the sealant layer 40 is beneficial to achieving a sealed connection between the back cover 10 and the camera decorative part 20, achieving the purpose of waterproofing the back cover assembly 100, and thus improving the connection stability between the back cover 10 and the camera decorative part 20. Moreover, the sealant layer 40 can cooperate with multiple adhesive parts 30 to provide double protection against movement between the first connecting part 13 and the second connecting part 22 in the circumferential direction along the mounting hole 11, further strengthening the connection stability between the back cover 10 and the camera decorative part 20.

[0132] Furthermore, before the sealant layer 40 cures, the liquid adhesive is prone to overflowing onto the exterior of the back cover assembly 100 due to excessive usage or shaking of the back cover assembly 100, affecting the aesthetics of the electronic device 200. Therefore, in this embodiment, by providing an overflow groove 1223 on the protrusion 122 as a buffer space for the liquid adhesive, the possibility of liquid adhesive overflowing onto the exterior of the electronic device 200 can be reduced. Furthermore, by providing a baffle 214 on the camera decorative piece 20, it can cooperate with the overflow groove 1223 provided on the first connecting part 13, providing double protection against adhesive overflow onto the exterior surface. In summary, by providing a baffle 214 and an overflow groove 1223 on both sides of the sealant layer 40, overflow of the liquid adhesive onto the electronic device 200 before curing can be prevented.

[0133] In the embodiments of this application, the thickness of the sealant layer 40 can be less than or equal to 0.15 mm. Exemplarily, the thickness of the sealant layer 40 can be controlled to within 0.15 mm by holding pressure with a pressure-holding fixture after glue application, ensuring waterproofing while also preventing interference between the camera decorative part 20 and other components within the device in the Z direction after assembly. For example, this prevents interference between the camera decorative part 20 and components such as the motherboard bracket and board-to-board (BTB) connectors.

[0134] Understandably, setting the thickness of the sealant layer 40 within the aforementioned range allows for waterproofing of the entire device while providing some space in the overall thickness direction. This not only provides tolerance for the installation of other structures within the electronic device 200, preventing assembly errors and mistakes caused by interference between components during assembly, but also improves the assembly efficiency of the electronic device 200. Furthermore, it aligns with the trend towards thinner and lighter electronic devices 200.

[0135] It should be noted that the shape of the sealant layer 40 is not limited to the shape shown in the figure; it can be a regular or irregular ring. The thickness of the sealant layer 40 is also not necessarily the same at different locations. The embodiments of this application do not impose specific limitations on the shape, thickness, or other characteristic parameters of the sealant layer 40, as long as the sealant layer 40 can ensure a sealed connection between the back cover 10 and the camera decorative piece 20, and is waterproof.

[0136] In embodiments of this application, the assembly of the back cover assembly 100 may include at least the following steps:

[0137] Step 1: Provide back cover 10, camera trim 20 and multiple adhesive parts 30.

[0138] Step 2: Adhere multiple adhesive pieces 30 to multiple first connecting portions 13 of the back cover 10, wherein the first adhesive layer 31 of each adhesive piece 30 is adhered to the surface of one first connecting portion 13 of the back cover 10 facing the main body 121 of the back cover 10.

[0139] Step 3: Align each second connecting part 22 of the camera decoration 20 with and place it at a notch 14 of the back cover 10. Rotate the camera decoration 20 clockwise or counterclockwise so that each first connecting part 13 is located in a slot 23 of the camera decoration 20 to complete the rough positioning between the camera decoration 20 and the back cover 10.

[0140] Step 4: Precisely position the camera trim 20 and the back cover 10. For example, a CCD (Charge Coupled Device) device can be used to detect and adjust the edge position of the camera trim 20, improving the misalignment problem between the camera trim 20 and the back cover 10 during the assembly process, so that the camera trim 20 and the back cover 10 can be precisely aligned and installed.

[0141] Step 5: Perform pre-processing on the back cover 10 and camera decorative part 20 with the adhesive part 30 attached, so that the back cover 10 and the camera decorative part 20 are fixedly connected.

[0142] For example, the preset process can be to place the back cover 10 with the adhesive 30 and the camera decoration 20 on a heating table, preheat the heating table to 60°C and maintain the temperature at 60°C for 2 minutes, so that the second adhesive layer 32 of the adhesive 30 also becomes adhesive, thereby bonding the second connection part 22, and thus completing the fixed connection between the back cover 10 and the camera decoration 20.

[0143] Step 6: Form a sealing layer 40 at the connection between the plurality of first connecting portions 13 of the back cover 10 and the plurality of second connecting portions 22 of the camera trim 20, so that the sealing layer 40 seals the connection between the back cover 10 and the camera trim 20.

[0144] For example, the gap between the back cover 10 and the camera trim 20 can be filled with adhesive at the notch 14 of the back cover 10, so that the liquid adhesive fills all the gaps at the joint between the back cover 10 and the camera trim 20. After the liquid adhesive cures, it forms a sealant layer 40. Then, a pressure holding device is used to ensure that the thickness of the sealant layer 40 is less than or equal to 0.15 mm.

[0145] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A back cover assembly, characterized in that, Including the back cover and camera trim: The rear cover includes a cover body and a plurality of first connecting parts. The cover body is provided with a mounting hole, which penetrates the cover body along the thickness direction. The plurality of first connecting parts are spaced apart on the inner wall of the mounting hole along the circumferential direction of the mounting hole. A notch is formed between two adjacent first connecting parts. The minimum extension length of the notch along the circumferential direction of the mounting hole is a first length. The camera decorative component is installed in the mounting hole. The camera decorative component includes a decorative component body and a plurality of second connecting parts. The first end of the decorative component body is located on the outside of the cover. The decorative component body passes through the mounting hole. The second end of the decorative component body is located on the inside of the cover. The plurality of second connecting parts are all located on the inside of the cover and are connected to the second end of the decorative component body at intervals along the circumferential direction of the decorative component body. The maximum extension length of the second connecting part along the circumferential direction of the decorative component body is the second length. The second length is less than or equal to the first length. The decorative component body and a plurality of second connecting parts surround and form a plurality of slots, wherein a first connecting part is located in a slot and is fixedly connected to a second connecting part.

2. The back cover assembly according to claim 1, characterized in that, The back cover assembly includes multiple adhesive components, each of which is located within a slot and connected between a first connecting portion and a second connecting portion. Each adhesive component includes a first adhesive layer and a second adhesive layer. The first adhesive layer is used to connect with the first connecting portion, and the second adhesive layer is used to connect with the second connecting portion when preset conditions are met.

3. The rear cover assembly according to claim 2, characterized in that, The first adhesive layer is made of a self-adhesive material, and the second adhesive layer is made of a hot-melt material or a photosensitive material.

4. The rear cover assembly according to claim 2 or 3, characterized in that, The thickness of the adhesive is 0.15mm-0.35mm.

5. The rear cover assembly according to any one of claims 1-3, characterized in that, The overlap length between the second connecting part and the first connecting part along the circumferential direction of the decorative part body is greater than or equal to 10 mm.

6. The back cover assembly according to any one of claims 1-3, characterized in that, The thickness of the first connecting part is 0.3mm-0.7mm.

7. The back cover assembly according to any one of claims 1-3, characterized in that, The camera decorative component is a one-piece structure.

8. The back cover assembly according to any one of claims 1-3, characterized in that, The decorative component body includes an outer surface portion and a baffle. The outer surface portion is located on the outside of the cover and abuts against the cover. The outer surface portion has a cavity, and the opening of the cavity is located on the surface of the outer surface portion facing the cover. The baffle is connected to the outer surface portion and is located at the edge of the opening of the cavity. The baffle extends along the circumferential direction of the cavity and passes through the mounting hole. One end of the baffle away from the decorative component body is connected to the second connecting portion. The baffle, the outer surface portion, and the second connecting portion cooperate to form the slot.

9. The rear cover assembly according to claim 8, characterized in that, The end of the first connecting portion away from the cover has a gap with the baffle.

10. The rear cover assembly according to claim 8, characterized in that, The rear cover assembly also includes a sealant layer, one side of which is connected to the cover body and a plurality of first connecting parts in the thickness direction of the sealant layer, and the other side of which is connected to a plurality of second connecting parts; the sealant layer is also connected to the baffle.

11. The rear cover assembly according to claim 10, characterized in that, The thickness of the sealant layer is less than or equal to 0.15 mm.

12. The rear cover assembly according to claim 10, characterized in that, The cover includes a main body and a protrusion connected to each other. The main body includes a first surface and a second surface disposed opposite to each other. The first surface faces the outer surface. The protrusion protrudes from the first surface toward the outer surface and is recessed from the second surface toward the outer surface. The protrusion abuts against the outer surface. The mounting hole is located on the protrusion and penetrates the protrusion along its thickness direction. The protrusion and the main body form a mounting groove, the mounting groove is coaxially arranged and connected with the mounting hole, and the sealant layer and the plurality of second connecting parts are all located in the mounting groove.

13. The rear cover assembly according to claim 12, characterized in that, The protrusion is provided with a groove and an overflow groove. The opening of the groove is located on the surface of the protrusion away from the main body. The groove is coaxially arranged and connected with the mounting hole. The opening of the overflow groove is located on the bottom wall of the groove. The overflow groove is connected to the groove and surrounds the mounting hole.

14. An electronic device, characterized in that, The electronic device includes a display module, a mid-frame, and a back cover assembly as described in claims 1-13, wherein the display module and the back cover assembly are respectively connected to both sides of the mid-frame in the thickness direction, and the display module, the mid-frame, and the back cover assembly surround to form a receiving cavity for the electronic device.

Images