Electronic equipment and rear cover assembly thereof

Abstract

The embodiment of the invention provides electronic equipment and a rear cover assembly thereof, and the rear cover assembly comprises a cover plate which is provided with an outer wall surface and an inner wall surface which are opposite to each other, the cover plate is also provided with a through installation hole, the outer wall surface corresponding to the installation hole is also provided with an installation table, and the installation table is provided with a plurality of positioning holes; the decoration assembly comprises a first decoration plate and a plurality of connecting pieces, and the connecting pieces are arranged on the inner plate face of the first decoration plate and extend in the direction away from the inner plate face; wherein the first decoration plate is detachably connected to the outer wall face corresponding to the mounting hole, the first decoration plate is connected with the mounting table in a matched mode, and the connecting piece is correspondingly connected into the positioning hole and connected to the inner wall face of the cover plate in a clamped mode. According to the technical scheme, through the arrangement of the limiting piece and the connecting piece, the first decoration plate can be easily combined with the cover plate, the assembling process of the rear cover assembly is simplified, meanwhile, the use of screws is reduced, the assembling complexity is improved, and the rear cover assembly has the advantages of being light in weight, easy to assemble and the like.

Description

Technical Field

[0001] The present application relates to the technical field, and in particular to an electronic device and a rear cover assembly thereof. Background Art

[0002] With the rapid development of technology, the popularity of intelligent folding terminal devices is also getting higher and higher. However, when assembling the decorative panel assembly on the battery cover of the current intelligent folding terminal device, a large number of screws and steel sheets are usually required to fix the upper decorative panel and the lower decorative panel to the battery cover, which not only increases the weight of the battery cover but also relatively increases the cost. In addition, through the screwing method, it is easy to cause gaps or deformations between structures due to improper installation, such as over-tightening or uneven fastening, and there are also disadvantages such as difficult disassembly. Summary of the Invention

[0003] In view of the above problems, the present application provides an electronic device and a rear cover assembly thereof to solve the above problems or at least partially solve the above problems.

[0004] In one embodiment of the present application, a rear cover assembly of an electronic device is provided, including:

[0005] A cover plate having opposite outer and inner wall surfaces, and a through mounting hole is further provided on the cover plate, and a mounting platform is further provided on the outer wall surface corresponding to the mounting hole, and a plurality of positioning holes are provided on the mounting platform;

[0006] A decorative assembly including a first decorative plate and a plurality of connecting members, the plurality of connecting members are provided on the inner plate surface of the first decorative plate and extend in a direction away from the inner plate surface;

[0007] Wherein, the first decorative plate is detachably connected to the outer wall surface corresponding to the mounting hole, the first decorative plate is in fit connection with the mounting platform, the connecting members are correspondingly connected to the positioning holes and are clamped on the inner wall surface of the cover plate.

[0008] Optionally, the mounting platform is located at the edge of the mounting hole, and the positioning hole is a closed through hole or a slotted hole with a notch.

[0009] Optionally, a limiting member is further included, and a limiting hole is further provided on the connecting member, and the limiting member is disposed in the limiting hole for clamping the connecting member on the inner wall surface.

[0010] Optionally, the limiting member is a connecting column, and along the axis of the column, the connecting column includes a head end, a tail end and a column body;

[0011] The outer diameter of the column body matches the aperture of the limiting hole, wherein the column body passes through the limiting hole, and at least one of the head end and the tail end abuts against the inner wall surface outside the limiting hole.

[0012] Optionally, the outer diameter of the tail end is smaller than the aperture diameter of the limiting hole, and the outer diameter of the head end is larger than the aperture diameter of the limiting hole;

[0013] An annular groove is provided on the outer peripheral surface of the head end, and the groove is used for arranging a locking member.

[0014] Optionally, the locking member is a retaining ring, a part of the retaining ring is embedded in the groove, and the other part is exposed outside the groove;

[0015] A flange is provided on the outer peripheral surface of the tail end, and the outer diameter of the flange is larger than the aperture diameter of the limiting hole.

[0016] Optionally, the limiting member is a buckle, the buckle includes a cross bar and two elastic arms arranged at intervals, hooks are provided at the ends of the elastic arms, and the hooks on the two elastic arms are arranged in opposite directions;

[0017] The cross bar abuts against one side of the limiting hole, the elastic arms pass through the limiting hole, and the hooks are clamped to the other side of the limiting hole.

[0018] Optionally, a hot melt post is provided at the end of the connecting member, and the end of the hot melt post is melt-connected to the inner wall surface of the cover plate.

[0019] Optionally, a groove is provided on the inner wall surface. When the limiting member is arranged in the limiting hole, a part of the limiting member abuts against the inner wall surface and is accommodated in the groove;

[0020] The depth of the groove is smaller than the thickness of the limiting member.

[0021] Optionally, the decoration assembly further includes a second decorative plate, which is detachably arranged on the first decorative plate, and the second decorative plate has a plurality of integrally formed hollow structures for accommodating corresponding electronic components.

[0022] Optionally, the second decorative plate is arranged on the inner plate surface of the first decorative plate, and the plurality of hollow structures are located in the mounting holes in the projection direction of the mounting holes.

[0023] Optionally, the second decorative plate includes a plate body and an outer frame, the plurality of hollow structures are located on the plate body, the outer frame surrounds the plate body, and a plurality of alignment holes are provided on the outer frame, and the plurality of alignment holes are arranged corresponding to the plurality of positioning holes;

[0024] When the second decorative plate is connected to the first decorative plate, the connecting members respectively pass through the positioning holes and the alignment holes, and the limiting member abuts against the outer frame to connect the first decorative plate and the second decorative plate to the cover plate.

[0025] Optionally, the first decorative panel is a metal decorative panel, and the second decorative panel is a plastic decorative panel.

[0026] In another embodiment of the present application, an electronic device is further provided, including a device body and the above-mentioned rear cover assembly, and the rear cover assembly is detachably arranged on the device body.

[0027] In the technical solution provided by the present application, a connecting member is arranged on the first decorative panel of the decorative panel assembly, and through a limiting member matching with the connecting member, the first decorative panel can be easily combined with the cover plate, which not only simplifies the assembly process of the rear cover assembly, but also reduces the use of screws and improves the assembly tightness, making the rear cover assembly have the advantages and effects of being lightweight and improving the sealing and waterproof effect. Description of the Drawings

[0028] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The illustrative embodiments and descriptions thereof of the present application are used to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:

[0029] Figure 1 is a schematic diagram of the electronic device provided by the embodiment of the present application;

[0030] Figure 2 is a schematic diagram of the rear cover assembly provided by the embodiment of the present application;

[0031] Figure 3 is an exploded schematic diagram of the rear cover assembly provided by the embodiment of the present application;

[0032] Figure 4 is a partially enlarged schematic diagram of the rear cover assembly provided by the embodiment of the present application;

[0033] Figure 5 is a partial cross-sectional view of the rear cover assembly provided by the embodiment of the present application;

[0034] Figure 6 is a schematic diagram of the limiting member provided by another embodiment of the present application;

[0035] Figure 7 is a partial cross-sectional view of the rear cover assembly provided by another embodiment of the present application;

[0036] Figure 8 is a partially enlarged schematic diagram of the rear cover assembly provided by a certain embodiment of the present application;

[0037] Figure 9 is a partial cross-sectional view of the rear cover assembly provided by a certain embodiment of the present application;

[0038] Figure 10 is an exploded schematic diagram of the rear cover assembly provided by yet another embodiment of the present application;

[0039] Figure 11 This is a partial cross-sectional view of the rear cover assembly provided by the embodiment of the present application. Detailed implementation manners

[0040] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0041] It should also be noted that the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, commodity or device including the said element.

[0042] Refer to Figures 1 to 5 , in an embodiment provided by the embodiment of the present application, the electronic device 100 includes, but is not limited to, devices with a camera module such as a mobile phone, a tablet computer, a smart watch, a laptop computer, a camera or a video camera, etc., to achieve functions such as photography and taking pictures, and is not limited to a specific type. Hereinafter, the electronic device 100 is taken as an example of a mobile phone for a detailed introduction. The electronic device 100 includes a device body 2 and a rear cover assembly 1, and the rear cover assembly 1 is detachably arranged on the device body 2. In the embodiment provided by the present application, the electronic device 100 is taken as an example of a smart mobile phone, the rear cover assembly 1 is the battery cover of the mobile phone, and the camera module is arranged between the device body 2 of the mobile phone and the rear cover assembly 1.

[0043] Refer to Figure 2 and Figure 3, the rear cover assembly 1 includes a cover plate 10 and a decoration assembly 20. The cover plate 10 includes an outer wall surface 101 and an inner wall surface 102 facing away from each other, and a mounting hole 11 penetrating through the outer wall surface 101 and the inner wall surface 102. There is also a mounting platform 3 on the outer wall surface 101 corresponding to the mounting hole 11. A plurality of positioning holes 12 are provided on the mounting platform 3, and the plurality of positioning holes 12 are spaced apart around the mounting hole 11. For example, the mounting hole 11 corresponds to the camera module on the device body 2, and is formed in a corresponding shape according to the shape of the camera module or the arrangement of its cameras. The shape of the mounting hole 11 includes but is not limited to: square, circular, polygonal. The plurality of positioning holes 12 are symmetrically arranged at the edges on the opposite two sides of the mounting hole 11, or are arranged around the mounting hole 11.

[0044] The decoration assembly 20 includes a first decorative plate 21 and a plurality of connecting members 211. The decoration assembly 20 has an inner plate surface 5 and an outer plate surface arranged opposite to each other. The plurality of connecting members 211 are provided on the inner plate surface 5 of the first decorative plate 21 and extend in a direction away from the inner plate surface 5. It can be understood that when the decoration assembly 20 is connected to the cover plate 10, the limiting member 22 extends towards the inside of the electronic device 100. Specifically, as Figure 2 shown, the plurality of connecting members 211 extend along the first direction A1, and the first direction A1 is the thickness direction of the electronic device. The plurality of connecting members 211 are spaced apart around the first decorative plate 21, and the arrangement positions of the plurality of connecting members 211 correspond to the arrangement positions of the positioning holes 12. The first decorative plate 21 is detachably connected to the outer wall surface 101 corresponding to the mounting hole 11. The first decorative plate 21 is connected in cooperation with the mounting platform 3. The connecting members 211 are correspondingly connected to the positioning holes 12, and the connecting members 211 are clamped on the inner wall surface 102 of the cover plate 10, thereby preventing the first decorative plate 21 from detaching from the cover plate 10, and thus enabling the combination of the decorative plate assembly 20 and the cover plate 10.

[0045] See Figure 3 , in an embodiment provided by the present application, the mounting platform 3 is located at the edge of the mounting hole 11, and the positioning hole 12 is a closed through hole (such as the hole 121 in Figure 3 ) or a slotted hole with a notch (such as the hole 122 in Figure 3 ). In addition, the positioning hole 12 is not limited to these two structures, as long as the connecting member 211 can be clamped on the cover plate 10, the requirements can be met.

[0046] Furthermore, see Figures 1 to 3, in an embodiment provided by the present application, the rear cover assembly 1 further includes a limiting member 22. The connecting member is further provided with a limiting hole 212. The limiting member 22 is disposed in the limiting hole 212 and is used to snap the connecting member 211 onto the inner wall surface 102. The limiting hole 212 can be a square hole or a circular hole. Specifically, each connecting member 211 has a limiting hole 212 disposed along the second direction A2, and the first direction A1 intersects the second direction A2. For example, the included angle between the second direction A2 and the first direction A1 is 90 degrees. The limiting hole 212 penetrates through opposite sides of the connecting member 211 and is located at one end of the connecting member 211 away from the first decorative plate 21. It can be understood that the limiting hole 212 is located at a position close to the end of the connecting member 211, and the second direction A2 is the width direction of the electronic device.

[0047] See Figure 3 , in another embodiment provided by the present application, each connecting member 211 has a limiting hole 212 disposed along the third direction A3, and the limiting member 22 is connected in the limiting hole 212 along the third direction A3. The third direction A3 can be considered as the length direction of the electronic device.

[0048] See Figures 3 to 7 , in an embodiment provided by the present application, the limiting member 22 is a connecting post (cylindrical pin). Along the axis direction of the post, the connecting post includes an opposite head end 221 and tail end 222, and a post body 223 connected between the head end 221 and the tail end 222. Moreover, the outer diameter of the post body 223 matches the aperture of the limiting hole 212 of the connecting member 211, that is, the outer diameter of the post body 223 is equal to or slightly smaller than the aperture of the limiting hole 212. Therefore, when the limiting member 22 is inserted through the limiting hole 212, the corresponding post body 223 is inserted into the limiting hole 212, and at least one of the head end 221 and the tail end 222 of the limiting member 22 abuts against the inner wall surface 102 of the cover plate 10 outside the limiting hole 212. For example, the length of the limiting member 22 is greater than the length of the limiting hole 212, so that after the limiting member 22 is inserted through the limiting hole 212, the head end 221 or the tail end 222 is respectively located on both sides of the limiting hole 212, thereby abutting against the inner wall surface 102 of the cover plate 10.

[0049] Such as Figure 6 and Figure 7As shown, in an embodiment provided by the present application, the outer diameter of the tail end 222 of the limiting member 22 is smaller than the aperture diameter of the limiting hole 212 of the connecting member 211, and the outer diameter of the head end 221 is larger than the aperture diameter of the limiting hole 212. Therefore, after the limiting member 22 is inserted into the limiting hole 212, the head end 221 abuts against one side of the limiting hole 212, and the tail end 222 exposes on the other side of the limiting hole 212. In a specific embodiment, a groove 224 is further provided at the connection between the column 223 and the head end 221. The groove 224 is recessed in the outer peripheral surface of the column 223 and is arranged around the column 223. In addition, a retaining ring 225 is sleeved on the column 223 of the limiting member 22. The retaining ring 225 can be made of, but is not limited to, deformable and ductile sealing materials such as rubber, silica gel or resin. Wherein, the retaining ring 225 is correspondingly sleeved on the groove 224, so that a part of the retaining ring 225 is embedded in the groove 224 and the other part exposes outside the groove 224. In this way, after the column 223 of the limiting member 22 is inserted into the limiting hole 212 of the connecting member 211, the retaining ring 225 is compressed and deformed due to its material properties and fills between the groove 224 and the inner surface of the limiting hole 212, and resistance can be generated to prevent the limiting member 22 from detaching from the limiting hole 212 and ensure the stability of the connection.

[0050] As Figure 6 and Figure 7 shown, in some other embodiments of the present application, a flange 2221 is provided on the outer peripheral surface of the tail end 222 of the limiting member 22. The outer diameter of the flange 2221 is larger than the aperture diameter of the limiting hole 212 of the connecting member 211, and when the tail end 222 exposes outside the limiting hole 212, the flange 2221 corresponds to the wall surface of the connecting member 211 to stop the displacement of the tail end 222 in the direction of the head end 221. For example, the limiting member 22 is made of slightly deformable plastic, and the outer diameter of the flange 2221 is slightly larger than the aperture diameter of the limiting hole 212, so that it can be compressed and deformed during the process of the tail end 222 passing through the limiting hole 212 and return to the original outer diameter after passing through the limiting hole 212 to stop the displacement of the tail end 222.

[0051] To improve the bonding effect between the decorative component 20 and the cover plate 10, refer to Figure 7 , in an embodiment provided by the present application, a groove 103 is further provided on the inner wall surface 102 of the cover plate 10. When the limiting member 22 is arranged in the limiting hole 212, a part of the limiting member 22 that abuts against the inner wall surface 102 is accommodated in the groove 103. For example, the inner wall surface 102 has grooves 103 recessed in the inner wall surface 102 corresponding to the positions of the head end 221 and the flange 2221 of the tail end 222 respectively. After the limiting member 22 is inserted into the limiting hole 212, the head end 221 and the flange 2221 can be respectively accommodated in the groove 103, which can prevent the decorative component 20 from sliding or displacing on the cover plate 10, thereby improving the stability of the connection.

[0052] In addition, in addition to the above-mentioned bolt type, the limiting member 22 can also be combined with the limiting hole 212 of the connecting member 211 by means of elastic engagement. As Figure 8 and Figure 9 shown, in an embodiment provided by the present application, the limiting member 22 is a snap fastener. The limiting member 22 includes a cross bar 9 and two elastic arms 14 arranged at intervals. Hooks 15 are provided at the ends of the elastic arms 14, and the hooks 15 on the two elastic arms 14 are arranged back to back. Specifically, when the snap fastener is snapped into the limiting hole 212, the cross bar 9 abuts against one side of the limiting hole 212, the elastic arms 14 pass through the limiting hole 212, and the hooks 15 are snapped onto the other side of the limiting hole 212.

[0053] In terms of the structure of the limiting hole 212, its aperture extends along the third direction A3, and this third direction A3 intersects with the first direction A1 and the second direction A2 respectively. For example, the included angles between the third direction A3 and the second direction A2 and the first direction A1 are both 90°.

[0054] Among them, the two hooks 15 arranged back to back are bent away from the limiting hole 212 along the third direction A3 respectively, so that the width between the two hooks 15 is greater than the aperture of the limiting hole 212. When the two elastic arms 14 pass through the limiting hole 212, the side walls of the elastic arms 14 abut against the opposite two side surfaces inside the limiting hole 212 respectively. In a specific embodiment, the limiting member 22 is made of slightly deformable plastic. Therefore, the two elastic arms 14 can drive the two hooks 15 to approach each other under the action of an external force, so that the width between the two hooks 15 is less than the aperture of the limiting hole 212. Then the hooks 15 can pass through the limiting hole 212, and after passing through the limiting hole 212, the elastic restoring force of the two elastic arms 14 drives the two hooks 15 to move away from each other, so that the width between the two hooks 15 is greater than the aperture of the limiting hole 212, thereby preventing the snap fastener from detaching from the limiting hole 212.

[0055] In an embodiment provided by the present application, a hot melt post is provided at the end of the connecting member 211. When the decorative component 20 is connected to the installation table 3 and the connecting member 211 passes through the positioning hole 12 and extends to the inner wall surface 102 of the cover plate 10, the end of the hot melt post is melted and connected to the inner wall surface 102 of the cover plate 10, thereby preventing the connecting member 211 from separating from the cover plate 10. Specifically, the hot melt post is a plastic hot melt post. When it is heated, it will partially melt, thereby forming a large head end at the end of the connecting member 211, and the large head end can abut against the inner wall surface of the cover plate 10, thereby limiting the connecting member 211, and the decorative component 20 will also be combined and connected with the cover plate 10.

[0056] See Figure 10 and Figure 11, in an embodiment provided by the present application, the decoration component 20 further includes a second decorative plate 23. The first decorative plate 21 and the second decorative plate 23 can be made of the same material or different materials. For example, the first decorative plate 21 is a metal decorative plate, such as pure titanium or titanium alloy, while the second decorative plate 23 is a plastic decorative plate. Among them, the second decorative plate 23 is detachably arranged on the first decorative plate 21, and the second decorative plate 23 has a plurality of integrally formed hollow structures 230. The structural forms of the plurality of hollow structures 230 conform to the appearance forms of some electronic components of the electronic device, so that the corresponding electronic components can be accommodated therein. For example, the second decorative plate 23 can be formed by plastic processing, and the shapes and sizes of the plurality of hollow structures 230 are designed to be suitable for accommodating the camera module, ensuring the integration of the decorative plate component 20 with the overall design of the electronic device 100.

[0057] Among them, the second decorative plate 23 is combined with the side of the first decorative plate 21 facing the cover plate 10, that is, on the inner plate surface of the first decorative plate 21, and the plurality of hollow structures 230 are located within the mounting holes 11 in the projection direction of the mounting holes 11. As Figure 2 and Figure 3 shown, in terms of assembly, the second decorative plate 23 can be combined with the first decorative plate 21 by means of bolts or clamping, etc., and then the decorative plate component 20 is connected to the cover plate 10 through the limiting member 22 and the connecting member 211 on the first decorative plate 21. It can be understood that through the combination method of the plurality of connecting members 211 and the limiting members 22 in the present application, the use amount of screws can be effectively reduced, the complexity, cost and total weight of the rear cover assembly 1 can be reduced, and at the same time, the sealing effect of the structure can be improved.

[0058] In addition, in addition to being combined with the first decorative plate 21 by means of bolts or clamping, etc., the second decorative plate 23 can also be fixed to the first decorative plate 21 through the connecting member 211 and the limiting member 22, further reducing the assembly complexity. As Figure 10 and Figure 11As shown, in an embodiment provided by the present application, the second decorative plate 23 includes a plate body 231 and an outer frame 232 surrounding the plate body 231. A plurality of hollow structures 230 are formed on the plate body 231. The outer frame 232 is provided with a plurality of alignment holes 2321, and the plurality of alignment holes 2321 are arranged corresponding to the plurality of positioning holes 12 of the cover plate 10. Among them, the second decorative plate 23 is detachably arranged on the inner wall surface 102 of the cover plate 10. The plurality of hollow structures 230 are located within the mounting hole 11 in the projection direction of the mounting hole 11 of the cover plate 10. And the connecting member 211 sequentially passes through the corresponding positioning hole 12 and alignment hole 2321, so that at least a part of the limiting member 22 abuts against the surface of the outer frame 232 to prevent the first decorative plate 21 from detaching from the cover plate 10. It can be understood that in this embodiment, only by means of the connecting member 211 and the limiting member 22, the first decorative plate 21 and the second decorative plate 23 can be respectively installed on the mounting hole and the inner wall surface 102 of the cover plate 10, achieving advantages and effects such as simplifying the assembly process, reducing the part cost, and reducing the total weight of the rear cover assembly 1.

[0059] Referring to Figure 1 , in an embodiment of the present application, an electronic device 100 is further provided. The electronic device 100 includes a device body 2 and the above-mentioned rear cover assembly 1. The rear cover assembly 1 is detachably arranged on the device body 2. The rear cover assembly 1 includes a cover plate 10 and a decoration assembly 20. The material of the cover plate 10 includes but is not limited to: polyurethane (polyurethane), metal, glass, plastic, leather, etc. The device assembly 20 includes a first decorative plate 21, and the material of the first decorative plate 21 is pure titanium or titanium alloy. For the specific structure of the rear cover assembly 1, reference can be made to the description in the above text, and details will not be repeated here.

[0060] In summary, in the technical solution provided by the present application, through the configuration of the limiting member and the connecting member, the first decorative plate can be easily combined with the cover plate, which not only simplifies the assembly process of the rear cover assembly, but also reduces the use of screws and improves the complexity of assembly, making the rear cover assembly have advantages such as light weight and easy assembly.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A rear cover assembly of an electronic device, characterized in that, it includes: A cover plate having opposite outer and inner wall surfaces. The cover plate is also provided with a through mounting hole. An installation platform is further provided on the outer wall surface corresponding to the mounting hole, and a plurality of positioning holes are provided on the installation platform; A decoration assembly including a first decorative plate and a plurality of connecting pieces. The plurality of connecting pieces are arranged on the inner plate surface of the first decorative plate and extend in a direction away from the inner plate surface; Wherein, the first decorative plate is detachably connected to the outer wall surface corresponding to the mounting hole. The first decorative plate is cooperatively connected with the installation platform. The connecting pieces are correspondingly connected to the positioning holes and are clamped on the inner wall surface of the cover plate.

2. The rear cover assembly of the electronic device according to claim 1, characterized in that, The installation platform is located at the edge of the mounting hole, and the positioning hole is a closed through hole or a slotted hole with a notch.

3. The rear cover assembly according to claim 2, characterized in that, It further includes a limiting member. The connecting piece is also provided with a limiting hole, and the limiting member is arranged in the limiting hole for clamping the connecting piece on the inner wall surface.

4. The rear cover assembly according to claim 3, characterized in that, The limiting member is a connecting column. Along the axis direction of the column, the connecting column includes a head end, a tail end and a column body; The outer diameter of the column body matches the inner diameter of the limiting hole. Wherein the column body passes through the limiting hole, and at least one of the head end and the tail end abuts against the inner wall surface outside the limiting hole.

5. The rear cover assembly according to claim 4, characterized in that, The outer diameter of the tail end is smaller than the inner diameter of the limiting hole, and the outer diameter of the head end is larger than the inner diameter of the limiting hole; An annular groove is provided on the outer peripheral surface of the head end, and the groove is used for arranging a locking member.

6. The rear cover assembly according to claim 5, characterized in that, The locking member is a retaining ring. A part of the retaining ring is embedded in the groove, and the other part is exposed outside the groove; A flange is provided on the outer peripheral surface of the tail end, and the outer diameter of the flange is larger than the inner diameter of the limiting hole.

7. The rear cover assembly according to claim 3, characterized in that, The limiting member is a buckle. The buckle includes a cross bar and two spaced elastic arms. Hooks are provided at the ends of the two elastic arms, and the hooks on the two elastic arms are arranged in opposite directions; The cross bar abuts against one side of the limiting hole, the elastic arms pass through the limiting hole, and the hooks are clamped on the other side of the limiting hole.

8. The rear cover assembly according to claim 2, characterized in that, A hot melt column is provided at the end of the connecting piece, and the end of the hot melt column is melt-connected to the inner wall surface of the cover plate.

9. The rear cover assembly according to claim 3, characterized in that, A groove is provided on the inner wall surface. When the limiting member is arranged in the limiting hole, a part of the limiting member abutting against the inner wall surface is accommodated in the groove; The depth of the groove is smaller than the thickness of the limiting member.

10. The rear cover assembly according to any one of claims 3 to 9, characterized in that, The decorative component further includes a second decorative panel, which is detachably arranged on the first decorative panel. The second decorative panel has a plurality of integrally formed hollow structures for accommodating corresponding electronic components.

11. The rear cover assembly according to claim 10, wherein, the second decorative panel is arranged on the inner panel surface of the first decorative panel, and the plurality of hollow structures are located within the mounting holes in the projection direction of the mounting holes.

12. The rear cover assembly according to claim 11, wherein, the second decorative panel includes a panel body and an outer frame. The plurality of hollow structures are located on the panel body. The outer frame surrounds the panel body, and a plurality of alignment holes are provided on the outer frame. The plurality of alignment holes are arranged corresponding to the plurality of positioning holes; when the second decorative panel is connected to the first decorative panel, the connecting members respectively pass through the positioning holes and the alignment holes, and the limiting members are in contact with the outer frame to connect the first decorative panel and the second decorative panel to the cover plate.

13. The rear cover assembly according to claim 10, wherein, the first decorative panel is a metal decorative panel, and the second decorative panel is a plastic decorative panel.

14. An electronic device, wherein, it includes a device body and the rear cover assembly according to any one of claims 1 to 13, and the rear cover assembly is detachably arranged on the device body.

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