Rear cover assembly and electronic equipment

Abstract

The embodiment of the invention provides a rear cover assembly and electronic equipment, and relates to the technical field of electronic equipment. The rear cover assembly comprises a battery cover, a camera decorating part and a first sealing part. The battery cover comprises an inner surface, an outer surface and a through hole, the outer surface and the inner surface are oppositely arranged in the thickness direction of the battery cover, and the through hole penetrates through the inner surface and the outer surface. The camera decorating part comprises an outer decorating part and an inner decorating part, the inner decorating part is located on the side, facing the through hole, of the outer decorating part, the outer decorating part comprises a first connecting part of an annular structure, the first connecting part is located on the side, back to the inner surface, of the battery cover, and the first connecting part is connected with the battery cover. The first sealing element is positioned between the first connecting part and the battery cover; and the orthographic projection of the first sealing element on the reference plane is arc-shaped. In this way, the attractiveness of the appearance of the electronic equipment can be improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of electronic equipment, and in particular, to a back cover assembly and an electronic device. BACKGROUND

[0002] At present, an electronic device includes a camera module, a battery cover and a camera decoration piece. The battery cover has a through hole. The camera module includes a plurality of camera modules. One part of the battery cover is inside the camera module, and the other part of the battery cover extends into the inside of the through hole. The camera decoration piece is connected to the battery cover and decorates the camera module. In order to improve the performance of the camera module, the size of the camera module is designed to be large, and the size of the camera module becomes very large. However, the increase in the size of the camera module also increases the difficulty of the modeling design of the camera decoration piece, which reduces the aesthetic degree of the electronic device in the camera module area, thereby reducing the aesthetic degree of the appearance of the electronic device. SUMMARY

[0003] Embodiments of the present application provide a back cover assembly and an electronic device, which can improve the aesthetic degree of the appearance of the electronic device.

[0004] The first aspect of the present application provides a back cover assembly, which includes a battery cover, a camera decoration piece and a first sealing piece. The battery cover includes an inner surface, an outer surface and a through hole. The outer surface is arranged opposite to the inner surface along the thickness direction of the battery cover. The through hole penetrates the inner surface and the outer surface. The camera decoration piece includes an outer decoration piece and an inner decoration piece. The inner decoration piece is located on the side of the outer decoration piece facing the through hole. The outer decoration piece includes a first connecting part in an annular structure. The first connecting part is located on the side of the battery cover away from the inner surface. The first connecting part is connected to the battery cover. The first sealing piece is located between the first connecting part and the battery cover. The shape of the orthogonal projection of the first sealing piece on a reference plane is arc-shaped. The reference plane is the plane where the length direction and the width direction of the battery cover are located.

[0005] The shape of the orthogonal projection of the first sealing piece on the reference plane being arc-shaped means that the first sealing piece is not in an annular structure. At this time, the first sealing piece is located in the gap formed by a part of the first connecting part and the outer surface of the battery cover. There is no first sealing piece in the gap formed by another part of the first connecting part and the outer surface of the battery cover. The overlap width of the other part of the first connecting part and the battery cover in the radial direction of the through hole is not constrained by the first sealing piece. Therefore, the width of the other part of the first connecting part can be reduced as much as possible, which reduces the difficulty of the modeling design of the outer decoration piece, improves the aesthetic sense of the modeling of the outer decoration piece, and enhances the aesthetic degree of the appearance of the camera decoration piece.

[0006] In addition, when the back cover assembly of this application embodiment is applied to a scenario where multiple camera modules of different heights exist, the higher camera modules are positioned opposite to the outer decorative component, and the lower camera modules are positioned opposite to the inner decorative component. This allows the minimum radial distance between the outer decorative component and the camera modules of different heights in the through hole to be extremely narrow. The outer decorative component achieves an extremely narrow margin design and can improve the aesthetics of the camera decorative component, thereby further enhancing the aesthetics of the electronic device.

[0007] In some possible implementations, the inner trim piece includes a second connecting portion and a protrusion connected to the second connecting portion, the protrusion extending into a through hole, and the second connecting portion located on the side of the battery cover facing away from the outer surface and connected to the battery cover. The rear cover assembly also includes a second seal, a third seal, and a fourth seal. The second seal is located between the second connecting portion and the battery cover, and the third seal is located between the protrusion and the outer trim piece. The battery cover, inner trim piece, outer trim piece, first seal, second seal, and third seal together form a cavity having a first opening and a second opening. The fourth seal is located inside the cavity and serves to prevent communication between the first opening and the second opening.

[0008] In this way, the first seal, the second seal, the third seal, and the fourth seal together form a sealing structure that seals the gap between the camera trim and the battery cover. After the electronic device is assembled, water from outside the electronic device cannot enter the interior of the electronic device through the cavity, thus meeting the waterproof requirements of the electronic device.

[0009] In some possible implementations, the battery cover includes a first region, a second region, and a third region connected sequentially. The first seal includes two first edge segments and a first intermediate segment connected between the two first edge segments. The orthographic projection of the first intermediate segment onto a reference plane lies inside the orthographic projection of the first region onto the reference plane, and the orthographic projections of the two first edge segments onto the reference plane lie inside the orthographic projection of the second region onto the reference plane. The second seal has an arc-shaped orthographic projection onto the reference plane. The second seal includes two second edge segments and a second intermediate segment connected between the two second edge segments. The orthographic projection of the second intermediate segment onto the reference plane lies inside the orthographic projection of the third region onto the reference plane, and the orthographic projections of the two second edge segments onto the reference plane lie inside the orthographic projection of the second region onto the reference plane.

[0010] Thus, after the back cover assembly is assembled, the orthographic projections of the first edge segment and the second edge segment on the reference plane at least partially overlap or are arranged radially opposite each other along the through hole. The orthographic projections of the first seal and the second seal on the reference plane can surround the orthographic projection of the through hole on the reference plane. Functionally, the first seal and the second seal can form an annular sealing path around the through hole, ensuring that the waterproof performance of the back cover assembly meets the requirements.

[0011] In some possible implementations, the orthographic projection of the second connecting portion onto the reference plane is arc-shaped. The first seal includes two first edge segments and a first intermediate segment connecting the two first edge segments. The two first edge segments overlap with the orthographic projection of the second connecting portion onto the reference plane, while the first intermediate segment does not overlap with the orthographic projection of the second connecting portion onto the reference plane.

[0012] In this way, the first seal and the second seal have an overlapping area in the thickness direction of the battery cover. The first seal and the second seal form an annular sealing path around the through hole, which prevents external water from entering the interior of the electronic device through the gap between the second connection and the battery cover, thus meeting the waterproof requirements of the electronic device.

[0013] In some possible implementations, the fourth seal divides the cavity into multiple spaced sub-cavities, with the first and second openings not communicating with the same sub-cavity.

[0014] In this way, the fourth seal prevents the first opening and the second opening from communicating, and water entering from the second opening cannot flow to the first opening, thus sealing the cavity.

[0015] In some possible implementations, the cavity has two first openings, and a second opening is located between the two first openings along the circumference of the through hole. The fourth seal includes a plurality of sealing bodies arranged circumferentially along the through hole, with at least one sealing body disposed between adjacent first and second openings, and adjacent sub-cavities separated by a sealing body.

[0016] In this way, after the back cover assembly is completed, the two sealing bodies divide the cavity into three separate sub-cavities. Two of these sub-cavities each have a first opening, and the remaining sub-cavity has a second opening. This ensures that the first and second openings are not connected to the same sub-cavity, achieving the purpose of preventing the first and second openings from communicating. After the electronic device is assembled, water from outside the electronic device may enter the cavity through the second opening. The sealing bodies prevent water from flowing towards the first opening, thus preventing water from outside the electronic device from entering the interior of the electronic device through the cavity.

[0017] In some possible implementations, the sealant is made of silicone rubber or UV-cured adhesive.

[0018] In this way, during the formation of the seal, the liquid seal has better fluidity and can flow to various narrow gaps, ensuring that the cured seal separates the first opening and the second opening.

[0019] In some possible implementations, the rear cover assembly also includes multiple dams located inside the cavity and spaced apart circumferentially along the through hole, with each seal having a dam on opposite sides of the through hole in the circumferential direction.

[0020] In this way, during the manufacturing process of the fourth seal, the dam can act as a dam to intercept the adhesive that forms the seal, thereby forming a seal at the corresponding position in the cavity and ensuring that the first opening and the second opening are separated.

[0021] In some possible implementations, the dam component is a dam adhesive component or a dispensing component, which can be formed by a dispensing process, which is simple.

[0022] In some possible implementations, at least one of the interior trim and the exterior trim also includes an adhesive filling hole communicating with the cavity.

[0023] In this way, during the assembly of the back cover assembly, glue is injected into the cavity through the glue injection hole to form a fourth seal.

[0024] In some possible implementations, the rear cover assembly also includes a decorative cover plate attached to the side of the outer trim piece facing away from the battery cover and covering the potting hole.

[0025] In this way, the decorative cover plate conceals the potting hole, further enhancing the aesthetics of the electronic device. Furthermore, it can seal the potting hole, preventing external water from entering the cavity through it.

[0026] In some possible implementations, the second seal is a sealant, which is bonded to both the second connection and the battery cover.

[0027] In some possible implementations, the third seal is a sealant, which is bonded to both the protrusion and the outer trim.

[0028] In some possible implementations, the first seal is a sealant, which is bonded to both the first connection portion and the battery cover.

[0029] A second aspect of this application provides an electronic device including a camera module and a back cover assembly according to any one of the first aspects. The back cover assembly includes an inner decorative element and an outer decorative element. The inner decorative element includes a first clearance hole, and the outer decorative element includes a second clearance hole and a third clearance hole, with the second clearance hole opposite to the first clearance hole. The camera module includes a first camera module and a second camera module. The height of the first camera module is less than the height of the second camera module. The first camera module is opposite to the first clearance hole, and the second camera module is opposite to the third clearance hole.

[0030] The camera module is composed of camera modules of different heights, which can improve the performance of the camera module and enhance image quality. Furthermore, the second camera module is positioned opposite the outer decorative component, and the first camera module is positioned opposite the inner decorative component. This allows for an extremely narrow minimum radial distance between the outer decorative component and the camera modules of different heights within the through-hole. The outer decorative component achieves an extremely narrow margin design, which also enhances the aesthetic appeal of the camera decorative component, further improving the overall aesthetics of the electronic device.

[0031] In some possible implementations, the first camera module includes a first lens that extends into a first clearance aperture. And / or, the second camera module includes a second lens that extends into a third clearance aperture.

[0032] By inserting the lens of the camera module (e.g., the first lens) into the clearance hole (e.g., the first clearance hole) of the camera decoration, the overall height of the camera module and the camera decoration after assembly can be reduced, and the internal space occupied by the electronic device can be reduced, thus reducing the difficulty of arranging the camera module.

[0033] In some possible implementations, the rear cover assembly also includes a lens element connected to the side of the outer trim piece away from the battery cover and covering the second and third clearance holes. Along the thickness direction of the electronic device, the distance between at least one of the first and second lenses and the lens element is greater than or equal to 0.15 mm and less than or equal to 0.3 mm.

[0034] By controlling the distance between the lens and the lens element to 0.15mm to 0.3mm, it helps to reduce the maximum thickness of electronic devices. Attached Figure Description

[0035] Figure 1 This is a rear view diagram of an electronic device in the related technology;

[0036] Figure 2 for Figure 1 A cross-sectional view along the DD direction;

[0037] Figure 3 A cross-sectional schematic diagram of a first type of electronic device provided in an embodiment of this application;

[0038] Figure 4 An exploded view of a second type of electronic device provided in an embodiment of this application;

[0039] Figure 5 for Figure 4 A rear view diagram of the electronic device shown;

[0040] Figure 6 for Figure 4A cross-sectional schematic diagram showing the back cover assembly of the electronic device in conjunction with the camera module;

[0041] Figure 7 for Figure 5 Enlarged view of the area indicated by the dashed line;

[0042] Figure 8 for Figure 5 A bottom view of the rear cover assembly (without the external trim) at the dotted line in the middle;

[0043] Figure 9 for Figure 5 A top view of the rear cover assembly (without the external trim) at the dotted line in the middle;

[0044] Figure 10 for Figure 6 A schematic diagram of the orthographic projection of the first seal, the second seal, the first region, the second region, and the third region onto the reference plane;

[0045] Figure 11 for Figure 8 A top view of the third seal in the diagram;

[0046] Figure 12 for Figure 7 A cross-sectional view along the AA direction;

[0047] Figure 13 for Figure 7 Cross-sectional view along the BB direction;

[0048] Figure 14 for Figure 9 Cross-sectional view along the BB direction;

[0049] Figure 15 A cross-sectional schematic diagram of another back cover assembly provided in an embodiment of this application;

[0050] Figure 16 A cross-sectional schematic diagram of another back cover assembly provided in an embodiment of this application;

[0051] Figure 17 A cross-sectional schematic diagram of another back cover assembly provided in an embodiment of this application;

[0052] Figure 18 for Figure 9 A cross-sectional view along the AA direction;

[0053] Figure 19 This is a schematic diagram of the first manufacturing process of a back cover assembly provided in an embodiment of this application;

[0054] Figure 20 This is a schematic diagram of the second manufacturing process of a back cover assembly provided in an embodiment of this application.

[0055] Explanation of reference numerals in the attached figures:

[0056] 100. Rear cover assembly; 101. First area; 102. Second area; 103. Third area;

[0057] 110. Battery cover; 111. Through hole; 112. Inner surface; 113. Outer surface;

[0058] 120. Camera decorative parts;

[0059] 121. Exterior trim piece; 1211. First connecting part; 1212. Main body part; 1213. Second clearance hole; 1214. Third clearance hole;

[0060] 122. Interior trim piece; 1221. Second connecting part; 1222. Protrusion; 1223. First clearance hole;

[0061] 123. Decorative cover plate; 124. Glue filling hole;

[0062] 130. First seal; 131. First edge segment; 132. First intermediate segment;

[0063] 140. Second seal; 141. Second edge section; 142. Second intermediate section;

[0064] 150. Third sealing element; 151. First arc-shaped segment; 152. Second arc-shaped segment;

[0065] 160. Fourth sealing element; 161. Sealing body;

[0066] 170. Cavity; 171. First opening; 172. Second opening;

[0067] 180. Dam components;

[0068] 200. Camera module; 210. First camera module; 220. Second camera module;

[0069] 300. Display screen;

[0070] 400, Mid-frame;

[0071] 500, battery;

[0072] 600, Motherboard;

[0073] X: length direction; Y: width direction; Z: thickness direction. Detailed Implementation

[0074] Figure 1 This is a rear view diagram of an electronic device in the related art. Figure 2 forFigure 1 A schematic cross-sectional view along the DD direction. Currently, see [link / reference]. Figure 2 As shown, the electronic device includes a battery cover 710, a camera module, a seal 730, and a camera trim 740. The battery cover 710 has a through hole 711. See also... Figure 1 As shown, the camera module includes three camera modules 720, namely, a first camera module 720A, a second camera module 720B, and a third camera module 720C. Figure 2 As shown, a portion of the camera module 720 is located inside the battery cover 710, and another portion extends into the through hole 711. The camera decorative element 740 may include an inner decorative element 742 and an outer decorative element 741. A portion of the inner decorative element 742 is located inside the battery cover 710, and another portion of the inner decorative element 742 extends into the through hole 711 and is located on the side of the outer decorative element 741 facing the battery cover 710. The outer decorative element 741 is located on the outer side of the battery cover 710. By decorating the camera module 720 with the camera decorative element 740, the thickness of the parts of the electronic device other than the camera module 720 can be designed to be smaller, achieving miniaturization and / or thinning of the electronic device. Figure 2 As shown, a seal 730 is disposed between the outer decorative part 741 and the outer surface of the battery cover 710. The seal 730 has an annular structure and surrounds the through hole 711. The seal 730 is made of adhesive. The seal 730 seals the gap between the outer decorative part 741 and the outer surface of the battery cover 710, preventing water from the outside of the electronic device from entering the interior of the electronic device.

[0075] However, to improve the performance of the camera module, the camera module 720 is designed to be larger, resulting in a larger overall size. Consequently, the size of the outer decorative piece 741 also increases. Simultaneously, to prevent external water from entering the electronic device, sufficient space is needed between the outer decorative piece 741 and the outer surface of the battery cover 710 to accommodate the sealing element 730, further increasing the size of the outer decorative piece 741. Therefore, with the increased size of the camera module, the minimum distance between the sidewall of the outer decorative piece 741 and the camera module 720 (e.g., ...) becomes crucial. Figure 1 The number of decorative elements (as shown in E or F) also increases, making the design of the camera decorative element 740 more difficult. This results in a less aesthetically pleasing design of the camera decorative element 740, reducing the overall aesthetic appeal of the electronic device in the camera module area and thus lowering the overall appearance of the electronic device.

[0076] Figure 3 This is a cross-sectional schematic diagram of a first electronic device provided in an embodiment of this application. In one embodiment, such as... Figure 3As shown, by placing the annular sealing member 730 between the inner decorative member 742 and the inner surface of the battery cover 710, the minimum distance between the side wall of the outer decorative member 741 and the camera module 720 can be reduced to less than [the specified value]. Figure 2 The minimum distance between the sidewall of the outer decorative piece 741 and the camera module 720 improves the aesthetics of the camera decorative piece 740. However, this method requires that the height of each camera module 720 is less than or equal to a preset height, for example, a preset height of 1.5mm. When there is a camera module 720 in the camera module whose height exceeds the preset height, for example... Figure 1 As shown, the height of the first camera module 720A is greater than the preset height, while the height of the second camera module 720B is less than the preset height. The distance between the sidewall of the outer decorative piece 741 and each camera module 720 is actually greater than the preset height. Figure 2 The minimum distance between the sidewall of the outer decorative component 741 and the camera module 720 is specified. Therefore, this method has limited application scenarios and cannot be used in scenarios where the height of the camera module 720 is greater than the preset height.

[0077] In view of this, embodiments of this application provide a back cover assembly and an electronic device. By providing a first sealing member with an arc-shaped structure between the outer decorative part and the battery cover, the difficulty of designing the outer decorative part can be reduced, the aesthetics of the outer decorative part can be improved, and the appearance of the electronic device can be enhanced. Furthermore, the first sealing member is mainly located near the taller camera module, thus the distance between the sidewall of the outer decorative part and the taller camera module can be extremely narrow. Since no first sealing member is provided between the portion of the outer decorative part near the shorter camera module and the battery cover, the distance between the portion of the outer decorative part near the shorter camera module and the shorter camera module can also be extremely narrow. This allows the outer decorative part to achieve an extremely narrow bezel design, enhancing the aesthetics of the design and improving the appearance of the electronic device.

[0078] This application provides an electronic device, which may include, but is not limited to, mobile phones, tablets, laptops, ultra-mobile personal computers (UMPCs), handheld computers, walkie-talkies, netbooks, point-of-sale (POS) machines, personal digital assistants (PDAs), wearable devices, virtual reality devices, etc.

[0079] For example, the following description uses a mobile phone as an example of an electronic device. A mobile phone can be a candybar phone, a foldable phone, a side-sliding phone, etc.

[0080] It should be noted that in the figures of the embodiments of this application, the X-axis can be defined as the length direction of the electronic device, the Y-axis as the width direction of the electronic device, and the Z-axis as the thickness direction of the electronic device. More specifically, the light-emitting surface of the display screen of the electronic device can be defined as the positive direction of the Z-axis.

[0081] Figure 4 This is an exploded view of the second type of electronic device provided in an embodiment of this application. Figure 5 for Figure 4 The diagram shows a rear view of the electronic device. Figure 6 for Figure 4 The diagram shows a cross-sectional view of the back cover assembly of the electronic device in conjunction with the camera module.

[0082] like Figure 4 As shown, the electronic device may include a display screen 300, a mid-frame 400, a camera module 200, a battery 500, a motherboard 600, and a rear cover assembly 100. The display screen 300 and the rear cover assembly 100 are respectively connected to opposite sides of the mid-frame 400. The display screen 300, the mid-frame 400, and the rear cover assembly 100 together enclose a receiving space, within which the motherboard 600, the battery 500, and the camera module 200 are housed.

[0083] The motherboard 600 is located between the mid-frame 400 and the rear cover assembly 100 and is connected to the mid-frame 400. The motherboard 600 may be a printed circuit board, and electronic components such as a processor, antenna module, Bluetooth module, and WIFI module are mounted on the motherboard 600.

[0084] Battery 500 provides power to the electronic device, ensuring the normal operation of its components, such as enabling display screen 300 to display image information. Battery 500 is located on the side of the back cover assembly 100 facing the mid-frame 400, meaning it is located inside the back cover assembly 100. The back cover assembly 100 provides protection for the battery 500, ensuring its safety.

[0085] The camera module 200 is used to constitute the rear camera device of the electronic device. The camera module 200 can also be called a rear camera. The rear cover assembly 100 has a light-transmitting area, and the camera module 200 is opposite to the light-transmitting area. The camera module receives light from outside the electronic device through the light-transmitting area to realize functions such as taking pictures and recording videos.

[0086] like Figure 6As shown, the camera module 200 may include a first camera module 210 and a second camera module 220. Along the thickness direction Z of the electronic device, the height of the first camera module 210 is less than the height of the second camera module 220. Therefore, the first camera module 210 can be referred to as a low-profile camera module, and the second camera module 220 can be referred to as a high-profile camera module. By constructing the camera module 200 with camera modules of different heights, the imaging performance of the camera module 200 can be improved.

[0087] The first camera module 210 may include a first lens and a first image sensor. The first lens is disposed on the photosensitive side of the first image sensor and is used to project light from outside the electronic device onto the photosensitive surface of the first image sensor.

[0088] The second camera module 220 may include a second lens and a second image sensor. The second lens is disposed on the photosensitive side of the second image sensor and is used to project light from outside the electronic device onto the photosensitive surface of the second image sensor.

[0089] like Figure 5 As shown, the camera module 200 may include three camera modules; of course, the number of camera modules may be more or less than three. Figure 5 As shown, the three camera modules can be arranged in a triangular pattern, or other patterns.

[0090] The height of the first camera module 210 is less than or equal to a preset height, and the height of the second camera module 220 is greater than the preset height. The specific value of the preset height is not limited here. For example, the preset height can be 1.5mm; of course, the preset height can also be other values.

[0091] The number of first camera modules 210 can be one or more, for example, the number of first camera modules 210 can be one. When there are multiple first camera modules 210, the heights of the multiple first camera modules 210 can be at least partially the same or different.

[0092] The number of second camera modules 220 can be one or more, for example, the number of second camera modules 220 can be two. When there are multiple second camera modules 220, the heights of the multiple second camera modules 220 can be at least partially the same or different.

[0093] like Figure 6As shown, the rear cover assembly 100 includes a battery cover 110, a camera trim 120, and a first seal 130. The battery cover 110 is connected to the mid-frame 400, and the battery 500 is located inside the battery cover 110, which protects the battery 500. The side of the battery cover 110 facing the battery 500 along its thickness direction Z can be defined as the inner side, and the side of the battery cover 110 facing away from the battery 500 along its thickness direction Z can be defined as the outer side.

[0094] like Figure 6 As shown, the battery cover 110 includes an inner surface 112, an outer surface 113, and a through hole 111. The outer surface 113 and the inner surface 112 are positioned opposite each other along the thickness direction Z of the battery cover 110. The through hole 111 penetrates both the inner surface 112 and the outer surface 113. The inner surface 112 of the battery cover 110 faces the battery 500 and is not visible to the user, while the outer surface 113 of the battery cover 110 faces away from the battery 500 and is visible to the user. The through hole 111 is used to avoid the camera module, and the axis of the through hole 111 is the same as the thickness direction Z of the battery cover 110. There can be one through hole 111. The shape of the through hole 111 can be, but is not limited to, rectangular, circular, elliptical, or a polygon with four or more sides.

[0095] A camera decorative element 120 is disposed at the through hole 111 and is used to decorate the camera module, improving the aesthetics of the electronic device in the camera module 200 area. For example... Figure 6 As shown, the camera trim 120 includes an inner trim 122 and an outer trim 121. The inner trim 122 and outer trim 121 are stacked along the thickness direction Z of the battery cover 110. Along the thickness direction Z of the battery cover 110, the inner trim 122 is located on the side of the outer trim 121 facing the through-hole 111, and is located between the mid-frame 400 and the outer trim 121. The outer trim 121 is located on the outside of the inner trim 122 facing away from the battery 500, and is located on the outside of the battery cover 110. The outer trim 121 can obscure the inner trim 122. When viewing the rear cover assembly 100 from the outside of the electronic device along the thickness direction Z of the battery cover 110, the outer trim 121 is visible, while the inner trim 122 is not easily visible.

[0096] For example, such as Figure 6As shown, the inner decorative component 122 may include a first clearance hole 1223, and the outer decorative component 121 may include a second clearance hole 1213 and a third clearance hole 1214, with the second clearance hole 1213 opposite to the first clearance hole 1223. A first camera module 210 is opposite to the first clearance hole 1223, and a second camera module 220 is opposite to the third clearance hole 1214. The first camera module 210 collects light from outside the electronic device through the first clearance hole 1223 and the second clearance hole 1213, and the second camera module 220 collects light from outside the electronic device through the third clearance hole 1214.

[0097] It should be noted that when there are multiple first camera modules 210, the first camera module 210 can also collect light from outside the electronic device through the fourth clearance hole (not shown in the figure) on the outer decorative part 121.

[0098] When there are multiple first camera modules 210, there are also multiple first clearance holes 1223 and multiple second clearance holes 1213, with each of the multiple first clearance holes 1223 corresponding to one of the multiple second clearance holes 1213. When there are multiple second camera modules 220, there are also multiple third clearance holes 1214, with each of the multiple second camera modules 220 corresponding to one of the multiple third clearance holes 1214.

[0099] The shape of the first clearance hole 1223 can be, but is not limited to, a rectangle, a circle, an ellipse, or a polygon with four or more sides. The shape of the second clearance hole 1213 can be, but is not limited to, a rectangle, a circle, an ellipse, or a polygon with four or more sides. The shape of the third clearance hole 1214 can be, but is not limited to, a rectangle, a circle, an ellipse, or a polygon with four or more sides.

[0100] In some embodiments, the first lens can extend into the first clearance hole 1223, and the diameter of the first lens is smaller than the inner diameter of the first clearance hole 1223, which helps to reduce the maximum thickness of the electronic device. Furthermore, to further reduce the maximum thickness of the electronic device, the first lens can also extend into the second clearance hole 1213, and the diameter of the first lens is smaller than the second clearance hole 1213.

[0101] In some embodiments, the second lens may extend into the third clearance hole 1214, and the diameter of the second lens is smaller than that of the third clearance hole 1214, which helps to reduce the maximum thickness of the electronic device.

[0102] The back cover assembly 100 may also include a lens element (not shown), which is attached to the side of the outer decorative element 121 away from the battery cover 110 and covers the second clearance hole 1213 and the third clearance hole 1214. The lens element may be made of a light-transmitting material, such as glass, allowing light from outside the electronic device to enter the second clearance hole 1213 and the third clearance hole 1214. Furthermore, the lens element can prevent water, dust, and other foreign objects from entering the interior of the electronic device through the second clearance hole 1213 and the third clearance hole 1214.

[0103] In some embodiments, along the thickness direction of the electronic device, the distance between at least one of the first lens and the second lens and the lens element is greater than or equal to 0.15 mm and less than or equal to 0.3 mm. For example, the distance between the first lens and the second lens and the lens element can both be greater than or equal to 0.15 mm and less than or equal to 0.3 mm.

[0104] There are no restrictions on the specific value of the distance between the lens (e.g., the first lens) and the lens element. For example, the distance between the lens and the lens element can be 0.2 mm.

[0105] The exterior trim 121 can be attached to the battery cover 110, for example, by adhesive bonding. The exterior trim 121 can also be attached to the interior trim 122, for example, by adhesive bonding.

[0106] Figure 7 for Figure 5 Enlarged view of the area indicated by the dashed line.

[0107] like Figure 6 As shown, the exterior trim 121 may include a first connecting portion 1211 and a main body portion 1212. The first connecting portion 1211 surrounds the main body portion 1212 and is connected to the main body portion 1212. The first connecting portion 1211 is located on the side of the battery cover 110 facing away from the inner surface 112, and is connected to the battery cover 110. The first connecting portion 1211 has a ring structure (e.g., Figure 7 As shown), the orthographic projection of the first connecting portion 1211 onto the reference plane is annular. For example, the orthographic projection of the first connecting portion 1211 onto the reference plane can be a triangular annular shape. The reference plane is the plane containing the length direction X and the width direction Y of the battery cover 110. Figure 6 As shown, the main body 1212 is provided with a second clearance hole 1213 and a third clearance hole 1214, and the main body 1212 is opposite to the through hole 111 along the thickness direction Z of the battery cover 110.

[0108] The inner trim piece 122 can be attached to the battery cover 110, for example, by adhesive bonding. As shown, a portion of the inner trim piece 122 is located inside the battery cover 110, and another portion of the inner trim piece 122 extends into the through hole 111 and is located on the side of the outer trim piece 121 facing the through hole 111.

[0109] like Figure 6 As shown, the interior trim 122 may include a second connecting portion 1221 and a protrusion 1222. The protrusion 1222 is connected to the second connecting portion 1221, extends into the through hole 111 and faces the main body portion 1212, and has a first clearance hole 1223. The second connecting portion 1221 is located on the side of the battery cover 110 facing away from the outer surface 113, and is connected to the battery cover 110.

[0110] Figure 8 for Figure 5 A bottom view of the rear cover assembly (without the exterior trim) at the point indicated by the dotted line.

[0111] like Figure 8 As shown, the protrusion 1222 occupies a portion of the through hole 111, that is, the orthographic projection of the protrusion 1222 on the reference plane is located inside a portion of the orthographic projection of the through hole 111 on the reference plane.

[0112] like Figure 8 As shown, the second connecting portion 1221 can be an arc-shaped structure surrounding the protrusion 1222, and the shape of the orthographic projection of the second connecting portion 1221 on the reference plane is arc-shaped. Therefore, the second connecting portion 1221 is not a ring-shaped structure surrounding the protrusion 1222. However, in some embodiments, to improve the reliability of the back cover assembly 100, the second connecting portion 1221 can also be a ring-shaped structure.

[0113] The first connecting part 1211 has a ring structure and the second connecting part 1221 has an arc structure. In the direction from the outer surface 113 to the inner surface 112 of the battery cover 110, the second connecting part 1221 is located below a part of the first connecting part 1211.

[0114] Figure 9 for Figure 5 A top-view diagram of the rear cover assembly (without the exterior trim) at the point indicated by the dotted line.

[0115] like Figure 6 As shown, the first seal 130 is located on the outside of the battery cover 110, between the first connecting portion 1211 and the battery cover 110. The shape of the first seal 130 in its orthographic projection on the reference plane is arc-shaped, that is, the first seal 130 is an arc-shaped structure surrounding a portion of the through hole 111 (e.g., Figure 9(As shown). The first seal 130 is located outside the orthographic projection of the through hole 111 onto the reference plane. Figure 6 As shown, the first seal 130 contacts the first connecting portion 1211 and the outer surface 113 of the battery cover 110. After the outer decorative part 121 and the battery cover 110 are assembled, the battery cover 110 and the outer decorative part 121 press against the opposite sides of the first seal 130.

[0116] The first seal 130 can seal a portion of the gap between the first connecting portion 1211 and the outer surface 113 of the battery cover 110. Specifically, the first connecting portion 1211 may include a first part and a second part, the orthographic projections of the first part and the second part on the reference plane do not overlap, and the shapes of the orthographic projections of the first part and the second part on the reference plane are both arc-shaped. At this time, the first seal 130 is located between the first part and the outer surface 113 of the battery cover 110, and the first seal 130 seals the gap between the first part and the outer surface 113 of the battery cover 110.

[0117] It should be noted that the first part can be understood as the first connecting part 1211 surrounding a part of the second camera module 220, and the second part can be understood as the first connecting part 1211 surrounding a part of the first camera module 210.

[0118] Since there is no first seal 130 between the second part and the battery cover 110, the first seal 130 does not constrain the width of the second part. Therefore, the width of the second part can be designed according to the styling requirements, and the distance between the second part and the camera module can be made very narrow, thereby reducing the difficulty of styling the outer decorative part 121 and improving the aesthetics of the outer decorative part 121. In addition, at least a portion of the second part is arranged around the first camera module 210. At this time, the first camera module 210 and the protrusion 1222 are stacked along the thickness direction Z of the battery cover 110. The distance between the inner wall of the through hole 111 and the first camera module 210 is relatively short, which can further shorten the distance between the second part and the first camera module 210. Therefore, when the camera module 200 uses camera modules of different heights, the distance between the outer decorative part 121 and the camera modules of different heights can be designed to be extremely narrow, reducing the difficulty of designing the shape of the outer decorative part 121, thereby enhancing the aesthetics of the outer decorative part 121 and improving the appearance of the electronic device in the area where the camera module 200 is located.

[0119] In some embodiments, the first sealant 130 can be a sealant. The first sealant 130 is bonded to the first connecting portion 1211 and the battery cover 110 respectively. The outer decorative part 121 can be bonded to the battery cover 110 through the first sealant 130, reducing the assembly difficulty of the outer decorative part 121 and the battery cover 110. The sealant material can be adhesive or glue, etc. When assembling the outer decorative part 121 and the battery cover 110, sealant can be pre-applied to the first connecting portion 1211 or the battery cover 110. Then, the outer decorative part 121 and the battery cover 110 are aligned and assembled so that both the first connecting portion 1211 and the battery cover 110 are bonded to the sealant, thus realizing the assembly of the outer decorative part 121 and the battery cover 110.

[0120] Because the first seal 130 seals the gap between the first part and the battery cover 110, the gap between the second part and the battery cover 110 is not sealed, allowing water from outside the electronic device to potentially enter the device through the gap between the second part and the battery cover 110. Therefore, as Figure 6 As shown, the rear cover assembly 100 may further include a second seal 140, a third seal 150, and a fourth seal 160. The second seal 140, the third seal 150, and the fourth seal 160 cooperate with each other to prevent water from the outside of the electronic device from entering the interior of the electronic device through the gap between the second part and the battery cover 110, thus ensuring the waterproof performance of the electronic device.

[0121] like Figure 6 As shown, the second seal 140 is located between the second connecting portion 1221 and the battery cover 110. The second seal 140 is located inside the battery cover 110. The orthographic projection of the second seal 140 on the reference plane is outside the orthographic projection of the through hole 111 on the reference plane. The shape of the orthographic projection of the second seal 140 on the reference plane is arc-shaped (e.g., Figure 8 (As shown). The second seal 140 contacts both the second connecting portion 1221 and the inner surface 112 of the battery cover 110. After the inner trim 122 is connected to the battery cover 110, the battery cover 110 and the inner trim 122 press against the opposite sides of the second seal 140. The second seal 140 can seal the gap between the second connecting portion 1221 and the inner surface 112 of the battery cover 110, preventing water entering through the gap between the second part and the battery cover 110 from entering the interior of the electronic device through the gap between the second connecting portion 1221 and the battery cover 110.

[0122] In some embodiments, the second seal 140 can be a sealant. The second seal 140 is bonded to the second connecting portion 1221 and the battery cover 110 respectively. The inner decorative part 122 can be bonded to the battery cover 110 through the second seal 140, reducing the assembly difficulty of the inner decorative part 122 and the battery cover 110. The sealant material can be adhesive or glue, etc. When assembling the inner decorative part 122 and the battery cover 110, sealant can be pre-applied to the second connecting portion 1221 or the battery cover 110. Then, the inner decorative part 122 and the battery cover 110 are aligned and assembled so that both the second connecting portion 1221 and the battery cover 110 are bonded to the sealant.

[0123] Figure 10 for Figure 6 A schematic diagram of the orthographic projection of the first seal, second seal, first region, second region, and third region onto a reference plane. Figure 10 The structures of the first seal 130 and the second seal 140 projected onto the reference plane are for illustrative purposes only and do not constitute a limitation on the structure of the first seal 130 and the second seal 140. Furthermore, Figure 10 The orthographic projections of the first seal 130 and the second seal 140 on the reference plane do not overlap; however, the orthographic projections of the first seal 130 and the second seal 140 on the reference plane may also overlap.

[0124] The back cover assembly 100 may include a first region 101, a second region 102, and a third region 103 connected in sequence, such as Figure 10 As shown, the orthographic projections of the first region 101, the second region 102, and the third region 103 onto the reference plane are not ring structures, and the orthographic projections of the first region 101, the second region 102, and the third region 103 onto the reference plane do not overlap.

[0125] like Figure 9 As shown, the first seal 130 may include two first edge segments 131 and a first intermediate segment 132 connecting the two first edge segments 131. Wherein, as... Figure 10 As shown, the orthographic projection of the first intermediate segment 132 on the reference plane lies inside the orthographic projection of the first region 101 on the reference plane, and the orthographic projections of the two first edge segments 131 on the reference plane lie inside the orthographic projection of the second region 102 on the reference plane. The orthographic projections of the two first edge segments 131 and the second connecting portion 1221 on the reference plane overlap, while the orthographic projections of the first intermediate segment 132 and the second connecting portion 1221 on the reference plane do not overlap.

[0126] like Figure 8 As shown, the second seal 140 includes two second edge segments 141 and a second intermediate segment 142 connecting the two second edge segments 141. Wherein, as...Figure 10 As shown, the orthographic projection of the second intermediate segment 142 onto the reference plane lies inside the orthographic projection of the third region 103 onto the reference plane, and the orthographic projections of the two second edge segments 141 onto the reference plane lie inside the orthographic projection of the second region 102 onto the reference plane. Figure 10 As shown, the first edge segment 131 is coupled to the second edge segment 141, so that the orthographic projections of the first seal 130 and the second seal 140 on the reference plane can form a ring structure.

[0127] like Figure 6 As shown, the third seal 150 is located between the protrusion 1222 and the outer decorative part 121. The third seal 150 contacts both the outer decorative part 121 and the protrusion 1222. The orthographic projection of the third seal 150 on the reference plane can be located inside the orthographic projection of the through hole 111 on the reference plane. After the outer decorative part 121 is assembled with the battery cover 110, the inner decorative part 122 and the outer decorative part 121 press against the opposite sides of the third seal 150. The third seal 150 can seal the gap between the protrusion 1222 and the outer decorative part 121.

[0128] In some embodiments, the third seal 150 can be a sealant, which is bonded to both the protrusion 1222 and the outer decorative element 121, thereby allowing the inner decorative element 122 to be bonded to the outer decorative element 121 via the third seal 150. The sealant can be made of adhesive backing or glue, etc. During the assembly of the back cover assembly 100, sealant can be pre-applied to either the protrusion 1222 or the outer decorative element 121. Then, the outer decorative element 121 is aligned and assembled with the battery cover 110 so that both the protrusion 1222 and the outer decorative element 121 are bonded to the sealant.

[0129] In some embodiments, such as Figure 6 As shown, the third seal 150 can cover the top surface of the protrusion 1222 facing the outer decorative element 121. In this case, the shape of the third seal 150 can be the same as the shape of the top surface of the protrusion 1222. However, the third seal 150 can also cover a portion of the top surface of the protrusion 1222 facing the outer decorative element 121.

[0130] Figure 11 for Figure 8 A top view of the third seal in the diagram.

[0131] At least a portion of the third seal 150 is an arc-shaped structure, for example Figure 11As shown, the third seal 150 may include a first arc-shaped segment 151 and a second arc-shaped segment 152. The second arc-shaped segment 152 is located inside the first arc-shaped segment 151 and is connected to the first arc-shaped segment 151. In this case, the shape of the orthographic projection of the third seal 150 on the reference plane can be similar to the shape of an "A". However, in some embodiments, the third seal 150 can be... Figure 11 The first arc-shaped segment 151 is formed, and at this time, the third sealing element 150 has an arc-shaped structure.

[0132] Figure 12 for Figure 7 A cross-sectional view along the AA direction. Figure 13 for Figure 7 A cross-sectional view along the BB direction. Figure 14 for Figure 9 A cross-sectional view along the BB direction. Wherein, Figure 12 to Figure 14 The structure of the back cover assembly 100 shown is only schematic and does not constitute a limitation on the specific structure of the back cover assembly 100.

[0133] After the battery cover 110 is assembled with the outer trim 121 and the inner trim 122, as follows Figure 12 As shown, the battery cover 110, inner decorative piece 122, outer decorative piece 121, first sealing piece 130, second sealing piece 140, and third sealing piece 150 together form a cavity 170, and the cavity 170 has a first opening 171 (as shown in the image). Figure 13 As shown in the diagram, the first opening 171 communicates with the interior of the electronic device, and the second opening 172 communicates with the exterior of the electronic device. The second opening 172 can be understood as the opening formed by the second part of the first connecting part 1211, both ends of the first sealing member 130, and the outer surface 113 of the battery cover 110. After the electronic device is assembled, the first opening 171 communicates with the interior of the electronic device, and the second opening 172 communicates with the exterior of the electronic device.

[0134] The second seal 140 and the second connecting portion 1221 both have arc-shaped orthographic projections on the reference plane, resulting in the cavity 170 having two first openings 171 (e.g., Figure 9 As shown, the second opening 172 is located between the two second openings 172 along the circumference of the through hole 111. Water entering the cavity 170 from the second opening 172 will be divided into two parts and flow in opposite directions toward the two first openings 171 respectively.

[0135] like Figure 9As shown, the fourth seal 160 is located inside the cavity 170. The fourth seal 160 is used to prevent the first opening 171 and the second opening 172 from communicating. That is, the fourth seal 160 separates the first opening 171 and the second opening 172, preventing water from flowing from the second opening 172 to the first opening 171. With this configuration, water from outside the electronic device that enters the cavity through the second opening 172 will be blocked by the fourth seal 160 and cannot pass through the first opening 171, thus preventing it from entering the interior of the electronic device.

[0136] In some embodiments, the fourth sealing member 160 can divide the cavity 170 into a plurality of mutually spaced sub-cavities, in which case any two sub-cavities are not connected. Each first opening 171 corresponds to a sub-cavity and is connected, and each second opening 172 corresponds to a sub-cavity. The first opening 171 and the second opening 172 are not connected to the same sub-cavity, thereby achieving the sealing of the cavity 170.

[0137] The fourth seal 160 may include a plurality of seal bodies 161 arranged circumferentially along the through hole 111, for example... Figure 9 As shown, the fourth seal 160 may include two seal bodies 161. At least one seal body 161 is disposed between adjacent first openings 171 and second openings 172 along the circumferential direction of the through hole 111, for example... Figure 13 As shown, a sealing body 161 is provided between adjacent first openings 171 and second openings 172. Two adjacent sub-cavities are separated by a sealing body 161, or in other words, adjacent first openings 171 and second openings 172 are separated by a sealing body 161.

[0138] Combination Figure 9 and Figure 14 It can be seen that the two sealing bodies 161 divide the cavity 170 into three sub-cavities arranged circumferentially along the through hole 111. Any two sub-cavities are not connected. Two of the sub-cavities each have a first opening 171, and the remaining sub-cavity has a second opening 172, such that the first opening 171 and the second opening 172 are not connected. Therefore, water from outside the electronic device will not enter the interior of the electronic device through the cavity 170.

[0139] It should be noted that, in addition to dividing the cavity 170 into multiple non-communicating sub-cavities to prevent the first opening 171 and the second opening 172 from communicating, in one embodiment, the fourth sealing member 160 can also be an integral structure. The fourth sealing member 160 fills the cavity 170 and seals the second opening 172, preventing water from the outside of the electronic device from entering the cavity 170 through the second opening 172, and also preventing water from the outside of the electronic device from entering the interior of the cavity 170.

[0140] In some embodiments, the sealing body 161 may be made of adhesive materials such as silicone rubber or UV-cured adhesive, ensuring that the sealing body 161 divides the cavity 170 into multiple non-communicating sub-cavities. Specifically, during the formation of the fourth seal 160, adhesive for forming the sealing body 161 is injected into the corresponding location, and the sealing body 161 is formed after the adhesive has cured.

[0141] Figure 15 This is a cross-sectional schematic diagram of another back cover assembly provided in an embodiment of this application. Figure 16 This is a cross-sectional schematic diagram of another back cover assembly provided in an embodiment of this application. Figure 17 This is a cross-sectional schematic diagram of another back cover assembly provided in an embodiment of this application.

[0142] In order to inject the adhesive forming the sealant 161 into the cavity 170, in some embodiments, at least one of the inner trim 122 and the outer trim 121 may include an injection hole 124 communicating with the cavity 170. In one embodiment, such as Figure 15 As shown, the interior trim 122 may be provided with one or more glue-filling holes 124. In another embodiment, as... Figure 16 As shown, the exterior trim 121 may be provided with one or more potting holes 124. In another embodiment, as... Figure 17 As shown, the inner decorative part 122 may be provided with one or more glue-filling holes 124, and the outer decorative part 121 may be provided with one or more glue-filling holes 124. After the outer decorative part 121 and the battery cover 110 are assembled, glue is poured into the cavity 170 through the glue-filling holes 124. After the glue cures, the fourth sealing part 160 is formed.

[0143] Each seal 161 corresponds to one or more injection holes 124, and the orthographic projection of each injection hole 124 on the reference plane is located inside the corresponding seal 161 on the reference plane. Adhesive is injected into the location of the seal 161 through the injection hole 124, and after the adhesive cures, the seal 161 is formed at the corresponding location, thereby forming the fourth seal 160.

[0144] When the exterior trim 121 is provided with an adhesive filling hole 124, in some embodiments, such as Figure 15 As shown, the fourth seal 160 can also seal (or block) the potting hole 124 to prevent water from the outside of the electronic device from entering the interior of the cavity 170 through the potting hole 124.

[0145] When the outer trim piece 121 is provided with a glue-filling hole 124, in some embodiments, such as Figure 16As shown, the camera decorative component 120 may also include a decorative cover plate 123. The decorative cover plate 123 is connected to the side of the outer decorative component 121 facing away from the battery cover 110 and covers the potting hole 124. It can shield the potting hole 124 on the outer decorative component 121, improving the aesthetics of the electronic device. It can also seal the potting hole 124, preventing water from the outside of the electronic device from entering the cavity 170 through the potting hole 124.

[0146] It should be noted that when the exterior trim 121 does not have a glue-filling hole 124, such as Figure 15 As shown, the camera decoration 120 may also include a decorative cover plate 123, in which case the decorative cover plate 123 can be used to improve the aesthetics of the camera decoration 120.

[0147] Figure 18 for Figure 9 A cross-sectional view along the AA direction. Figure 18 The structure of the dam component 180 shown is merely schematic and does not constitute a limitation on the specific structure of the dam component 180. Furthermore, in Figure 18 In the process, the dam component 180 is fitted with the second seal component 140. However, in some scenarios, there may be a gap between the dam component 180 and the second seal component 140, so the dam component 180 and the second seal component 140 may or may not be in contact.

[0148] In some possible implementations, such as Figure 13 As shown, the rear cover assembly 100 may further include a plurality of dam members 180 located inside the cavity 170. The plurality of dam members 180 are arranged at circumferential intervals along the through-hole 111, for example... Figure 9 As shown, the rear cover assembly 100 may include four dam members 180 arranged circumferentially spaced along the through hole 111. For example... Figure 18 As shown, a portion of each dam member 180 is located within the gap between the inner wall of the through hole 111 and the protrusion 1222, while another portion is located outside the through hole 111. Each sealing body 161 has a dam member 180 on opposite sides of the through hole 111 in the circumferential direction, for example... Figure 9 As shown, there are two sealing bodies 161, and each sealing body 161 has a dam component 180 on each side.

[0149] During the formation of the fourth seal 160, glue is injected into the area between the two dam members 180 through the glue injection hole 124. The dam member 180 can act as a dam to intercept the glue forming the seal 161, ensuring that the seal 161 is formed in the corresponding position after the glue cures, and can make the seal 161 in close contact with the inner wall of the cavity 170, so that the cavity 170 is divided into multiple non-connected sub-cavities.

[0150] like Figure 9 As shown, two damming elements 180 are provided between adjacent first openings 171 and second openings 172. However, the number of damming elements 180 between adjacent first openings 171 and second openings 172 can also be more than three. For example, the number of damming elements 180 between two adjacent first openings 171 and second openings 172 can be three. In this case, the number of sealing bodies 161 is two, and the damming elements 180 and sealing bodies 161 are arranged alternately.

[0151] It should be noted that when two sealing bodies 161 are provided between adjacent first openings 171 and second openings 172, since there may be a gap between the dam member 180 and the second sealing member 140, the glue forming the sealing body 161 will pass through the gap between the dam member 180 and the second sealing member 140, so that the two adjacent sealing bodies 161 are connected.

[0152] In some embodiments, the dam component 180 can be a dam adhesive component or a dispensing component, etc., to be formed by dispensing process, which is simple. In some embodiments, after the inner decorative component 122 and the battery cover 110 are assembled, adhesive can be dispensed into a preset position in the gap between the protrusion 1222 and the inner wall of the through hole 111 by dispensing process, and the dam component 180 is formed after the adhesive cures.

[0153] It should be noted that, in the above description, the second seal 140 and the second connecting portion 1221 are arc-shaped structures. However, in some scenarios, the second connecting portion 1221 can also be an annular structure. In this case, the second seal 140 can be either arc-shaped or annular. When the second seal 140 is an annular structure, at least a portion of its width is an effective waterproof width. For example, the effective waterproof width of the second seal 140 used to form a part of the cavity 170 can be 1.3 mm. Of course, the effective waterproof width can also be other values. In this case, the annular structure of the second connecting portion 1221 can also improve reliability.

[0154] In summary, after the back cover assembly 100 is assembled, the inner decorative part 122 and the outer decorative part 121 are stacked along the thickness direction Z of the battery cover 110. The first sealing member 130 seals a portion of the gap between the outer decorative part 121 and the outer surface 113 of the battery cover 110. The second sealing member 140 seals a portion of the gap between the inner decorative part 122 and the inner surface 112 of the battery cover 110. The third sealing member 150 seals the gap between the inner decorative part 122 and the outer decorative part 121. The fourth sealing member 160 seals the cavity 170, preventing the first opening 171 and the second opening 172 of the cavity 170 from communicating. Under the sealing structure formed by the first sealing member 130, the second sealing member 140, the third sealing member 150, and the fourth sealing member 160, water from outside the electronic device cannot enter the interior of the electronic device through the gaps between the camera decorative parts 120, and the waterproof performance of the electronic device meets the usage requirements.

[0155] Furthermore, the sealing structure formed by the first seal 130, the second seal 140, the third seal 150, and the fourth seal 160 can be applied to scenarios where camera modules of different heights coexist. The lower-height first camera module 210 cooperates with the inner decorative component 122, while the higher-height second camera module 220 cooperates with the outer decorative component 121. The margin between the outer decorative component 121 and the first camera module 210 and the second camera module 220 can be designed to be extremely narrow. In addition, the first seal 130 is not provided in the gap between the portion of the outer decorative component 121 near the first camera module 210 and the battery cover 110. The width of this portion can be further reduced, and the width of this portion can be smaller than the width of the portion of the outer decorative component 121 near the second camera module 220.

[0156] Therefore, the use of an arc-shaped first sealing element 130, along with the low-height camera module and inner decorative element 122, can reduce the difficulty of designing the outer decorative element 121, improve the aesthetics of the outer decorative element 121, enhance the aesthetics of the electronic device in the camera module 200 area, and increase the appearance of the electronic device.

[0157] Figure 19 This is a schematic diagram of the first manufacturing process of a back cover assembly provided in an embodiment of this application. Figure 20 This is a schematic diagram of the second manufacturing process of a back cover assembly provided in an embodiment of this application.

[0158] This application embodiment also provides a method for preparing a back cover assembly 100, combined with Figure 19 and Figure 20 It can be seen that the preparation method may include the following steps:

[0159] S1. Assemble the interior trim 122 and the battery cover 110 to form the first intermediate body (e.g., ...). Figure 19 (As shown in A1).

[0160] Specifically, firstly, a second sealant 140 is applied to the surface of the second connecting portion 1221 of the inner trim 122. Then, the protrusion 1222 of the inner trim 122 is inserted into the through hole 111 of the battery cover 110. Finally, the inner trim 122 and the battery cover 110 are pressed together so that the battery cover 110 contacts the second sealant 140 and forms a first intermediate body. It should be noted that the second sealant 140 can also be applied to the inner surface 112 of the battery cover 110 first.

[0161] S2. Assemble the first intermediate body and the dam component 180 to form the second intermediate body (e.g., ...). Figure 19 (As shown in A2).

[0162] Specifically, the damming adhesive is applied by dispensing to the corresponding position in the gap between the protrusion 1222 and the through hole 111 (e.g., Figure 9 (The four damming components 180 are located at the positions of the damming adhesive). After the damming adhesive cures, the damming components 180 are formed and the second intermediate is formed. At this time, the damming components 180 are damming adhesive components. Of course, the damming components 180 can also be dispensing adhesive components.

[0163] S3. Assemble the third seal 150 and the second intermediate to form the third intermediate (e.g. Figure 19 (As shown in A3).

[0164] Specifically, the third sealant 150 is applied to the surface of the protrusion 1222 of the inner decorative part 122 of the second intermediate body, and the third intermediate body is formed after the application. Of course, the third sealant 150 can also be applied to the surface of the main body 1212 of the outer decorative part 121.

[0165] S4. Assemble the first seal 130 and the third intermediate to form the fourth intermediate (e.g., Figure 19 (As shown in A4).

[0166] Specifically, a first sealant 130 is coated on the outer surface 113 of the battery cover 110 of the third intermediate to form the fourth intermediate. Alternatively, the first sealant 130 can be coated on the surface of the first connecting portion 1211 of the outer decorative part 121.

[0167] S5. Assemble the outer decorative part 121 and the fourth intermediate body to form a fifth intermediate body with a cavity 170 (e.g., Figure 20 (As shown in A5).

[0168] Specifically, the outer decorative piece 121 is aligned with and pressed against the battery cover 110. The outer decorative piece 121 is bonded to the inner decorative piece 122 via the third seal 150, and to the battery cover 110 via the first seal 130. The inner decorative piece 122, outer decorative piece 121, second seal 140, third seal 150, first seal 130, and battery cover 110 form a cavity 170. The cavity 170 has two first openings 171 and one second opening 172 (e.g., ...). Figure 9 (As shown).

[0169] S6. Assemble the fifth intermediate body and the fourth seal 160 to form the rear cover assembly 100 (e.g., ...). Figure 20 (As shown in A6).

[0170] Specifically, glue is injected into the area between the two dam components 180 through the glue injection hole 124. After the glue cures, a sealing body 161 is formed between the two dam components 180, resulting in a fourth sealing component 160 located in the cavity 170.

[0171] It should be noted that when the outer decorative part 121 is provided with a potting hole 124, after the fourth sealing part 160 is formed, the decorative cover plate 123 is connected to the side of the outer decorative part 121 facing away from the battery cover 110 (e.g. Figure 20 (As shown in A7).

[0172] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0173] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0174] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0175] The term "multiple" in this article refers to two or more. The term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Furthermore, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects; in formulas, the character " / " indicates a "division" relationship between the preceding and following related objects.

[0176] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0177] It is understood that, in the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

Claims

1. A rear cover assembly (100) characterized by, The rear cover assembly (100) comprises a battery cover (110), a camera decoration piece (120) and a first sealing piece (130); The battery cover (110) comprises an inner surface (112), an outer surface (113) and a through hole (111), the outer surface (113) is opposite to the inner surface (112) along the thickness direction of the battery cover (110), and the through hole (111) penetrates the inner surface (112) and the outer surface (113); The camera decoration piece (120) comprises an outer decoration piece (121) and an inner decoration piece (122), the inner decoration piece (122) is located on the side of the outer decoration piece (121) facing the through hole (111), the outer decoration piece (121) comprises a first connecting part (1211) in an annular structure, the first connecting part (1211) is located on the side of the battery cover (110) away from the inner surface (112), and the first connecting part (1211) is connected with the battery cover (110); The first sealing piece (130) is located between the first connecting part (1211) and the battery cover (110), and the shape of the orthographic projection of the first sealing piece (130) on a reference plane is arc-shaped, the reference plane being a plane in which the length direction and the width direction of the battery cover (110) are located.

2. The rear cover assembly (100) according to claim 1, characterized in that The inner decoration piece (122) comprises a second connecting part (1221) and a convex part (1222), the convex part (1222) is connected with the second connecting part (1221), the convex part (1222) extends into the through hole (111), and the second connecting part (1221) is located on the side of the battery cover (110) away from the outer surface (113) and is connected with the battery cover (110); The rear cover assembly (100) further comprises a second sealing piece (140), a third sealing piece (150) and a fourth sealing piece (160), the second sealing piece (140) is located between the second connecting part (1221) and the battery cover (110), the third sealing piece (150) is located between the convex part (1222) and the outer decoration piece (121), the battery cover (110), the inner decoration piece (122), the outer decoration piece (121), the first sealing piece (130), the second sealing piece (140) and the third sealing piece (150) jointly enclose a cavity (170), the cavity (170) has a first opening (171) and a second opening (172), the fourth sealing piece (160) is located inside the cavity (170), and the fourth sealing piece (160) is used for making the first opening (171) and the second opening (172) not communicate.

3. The rear cover assembly (100) of claim 2, wherein, The rear cover assembly (100) comprises a first region (101), a second region (102) and a third region (103) connected in sequence; The first seal (130) comprises two first edge sections (131) and a first middle section (132) connected between the two first edge sections (131), a projection of the first middle section (132) on a reference plane is located inside a projection of the first area (101) on the reference plane, and projections of the two first edge sections (131) on the reference plane are located inside a projection of the second area (102) on the reference plane. The second seal (140) comprises two second edge sections (141) and a second middle section (142) connected between the two second edge sections (141), a projection of the second middle section (142) on a reference plane is located inside a projection of the third area (103) on the reference plane, and projections of the two second edge sections (141) on the reference plane are located inside a projection of the second area (102) on the reference plane.

4. The rear cover assembly (100) according to claim 2 or 3, characterized in that The second connecting portion (1221) has an arc-shaped projection on a reference plane. The first seal (130) comprises two first edge sections (131) and a first middle section (132) connected between the two first edge sections (131), projections of the two first edge sections (131) on a reference plane overlap with a projection of the second connecting portion (1221) on the reference plane, and a projection of the first middle section (132) on the reference plane does not overlap with the projection of the second connecting portion (1221) on the reference plane.

5. The rear cover assembly (100) according to any one of claims 2 to 4, characterized in that The fourth seal (160) divides the cavity (170) into a plurality of sub-cavities that are separated from each other, and the first opening (171) and the second opening (172) do not communicate with the same sub-cavity.

6. The rear cover assembly (100) according to any one of claim 5, characterized in that, The cavity (170) has two first openings (171), and the second opening (172) is located between the two first openings (171) in a circumferential direction of the through hole (111). The fourth seal (160) comprises a plurality of sealing bodies (161) arranged in a circumferential direction of the through hole (111), at least one sealing body (161) is arranged between adjacent first openings (171) and second openings (172), and two adjacent sub-cavities are separated by one sealing body (161).

7. The rear cover assembly (100) of claim 6, wherein, The sealing body (161) is made of silicone rubber or shadow-free glue.

8. The rear cover assembly (100) according to claim 6 or 7, characterized in that The rear cover assembly (100) further comprises a plurality of dam members (180) arranged in a circumferential direction of the through hole (111) and spaced apart inside the cavity (170), and each sealing body (161) is provided with one dam member (180) on each of its opposite sides in the circumferential direction of the through hole (111).

9. The rear cover assembly (100) of claim 8, wherein, The dam member (180) is a dammed glue member or a point glue member.

10. The rear cover assembly (100) according to any one of claims 5 to 9, characterized in that At least one of the inner decorative member (122) and the outer decorative member (121) further comprises a glue filling hole (124) in communication with the cavity (170).

11. The rear cover assembly (100) of claim 10, wherein, The rear cover assembly (100) further comprises a decorative cover plate (123) connected to a side of an outer decorative part (121) away from the battery cover (110) and covering the glue pouring hole (124).

12. The rear cover assembly (100) according to any one of claims 2 to 11, characterized in that The second sealing member (140) is sealing glue, and the second sealing member (140) is bonded with the second connecting part (1221) and the battery cover (110) respectively; and / or, The third sealing member (150) is sealing glue, and the third sealing member (150) is bonded with the convex part (1222) and the outer decorative part (121) respectively.

13. The rear cover assembly (100) according to any one of claims 1 to 12, characterized in that The first sealing member (130) is sealing glue, and the first sealing member (130) is bonded with the first connecting part (1211) and the battery cover (110) respectively.

14. An electronic device, comprising: The rear cover assembly (100) comprises a camera module (200) and any one of claims 1 to 13; The inner decorative part (122) comprises a first avoiding hole (1223), the outer decorative part (121) comprises a second avoiding hole (1213) and a third avoiding hole (1214), and the second avoiding hole (1213) is opposite to the first avoiding hole (1223); The camera module (200) comprises a first camera module (210) and a second camera module (220), the height of the first camera module (210) is less than the height of the second camera module (220), the first camera module (210) is opposite to the first avoiding hole (1223), and the second camera module (220) is opposite to the third avoiding hole (1214).

15. The electronic device of claim 14, wherein, The first camera module (210) comprises a first lens, and the first lens extends into the first avoiding hole; and / or, The second camera module (220) comprises a second lens, and the second lens extends into the third avoiding hole (1214).

16. The electronic device of claim 15, wherein, The rear cover assembly (100) further comprises a lens part connected to a side of the outer decorative part (121) away from the battery cover (110) and covering the second avoiding hole (1213) and the third avoiding hole (1214), and the distance between at least one lens of the first lens and the second lens and the lens part in the thickness direction of the electronic device is greater than or equal to 0.15mm and less than or equal to 0.3mm.

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