CN207305189U - Cover plate assembly, display screen component and electronic device - Google Patents

Abstract

The utility model discloses a kind of cover plate assembly, display screen component and electronic device.Cover board includes cover board, case ring and sealing ring.The cover board offers installation through-hole.Case ring is arranged in the installation through-hole, and the case ring includes the lateral surface opposite with the side wall of the installation through-hole, and the lateral surface is formed with the circumferentially extending groove along the case ring.The sealing ring is arranged in the groove to seal the gap between the side wall of the installation through-hole and the lateral surface.In the cover plate assembly of the utility model embodiment, display screen component and electronic device, groove is conducive to fixed seal ring, so that sealing ring can seal the gap between the lateral surface of basic ring and installation through-hole, it can so prevent water, dust and other impurities from entering from the gap between the lateral surface and installation through-hole of basic ring in electronic device and influencing electronic device normal work.

Description

Cover assembly, display assembly and electronic device

This application is a divisional case with the filing date of "March 01, 2017", the application number of "201720195785.1", and the application name of "decorative ring, cover assembly, display assembly and electronic device".

technical field

The utility model relates to the field of electronic devices, in particular to a cover plate assembly, a display screen assembly and an electronic device.

Background technique

In related technologies, some mobile phones include a fingerprint recognition module and a decorative ring, and the fingerprint recognition module is fixedly arranged in the decorative ring to make the appearance of the mobile phone more beautiful. However, there is a gap between the decorative ring and the cover plate, and water, dust and other sundries can easily enter the interior of the electronic device through the gap between the decorative ring and the cover plate, thereby affecting the normal operation of the electronic device.

Utility model content

The embodiment of the utility model provides a cover plate assembly, a display screen assembly and an electronic device.

The cover plate assembly in the embodiment of the present utility model includes a cover plate, and the cover plate is provided with a mounting through hole; a decorative ring is arranged in the mounting through hole, and the decorative ring includes a The outer surface of the outer surface is formed with a groove extending along the circumference of the decorative ring; and a sealing ring is arranged in the groove to seal the side wall of the installation through hole and the gap between the outer sides.

In some embodiments, the decorative ring includes: a base ring, the base ring includes the outer surface; and an abutting portion extending outward from the top of the base ring, the abutting portion includes a The abutment surface connected to the outer surface of the base ring, the angle between the abutment surface and the outer surface of the base ring is a right angle or an obtuse angle, and the abutment surface abuts against the cover plate to limit the The decorative ring moves downward relative to the cover plate.

In some embodiments, the resisting portion includes a guiding slope opposite to the resisting surface, and the guiding slope is connected to the inner side of the base ring and slopes downward toward the inner side of the base ring.

In some embodiments, the bezel includes a support edge extending inwardly from the bottom of the inner side of the base ring.

In some embodiments, the supporting edge is perpendicular to the inner side of the base ring.

In some embodiments, the base ring includes a bottom surface, and the lower surface of the supporting edge is flush with the bottom surface.

In some embodiments, the supporting edge is formed with an avoidance hole communicating with the central hole of the base ring.

In some embodiments, the escape hole is in the shape of a rounded rectangle, and the long side wall of the escape hole is provided with an avoidance groove communicating with the escape hole, and the escape groove extends along the length direction of the escape hole.

In some embodiments, the cover plate includes an upper surface, and the intersection of the side wall of the installation through hole and the upper surface is obliquely connected to form a limiting surface, and the limiting surface and the abutting surface Matching, the abutting surface abuts against the limiting surface.

In some embodiments, the sealing ring includes a silicone sealing ring.

The display screen assembly in the embodiment of the present utility model includes the cover plate assembly and the display screen in the above embodiment, and the display screen is arranged on the lower surface of the cover plate.

The electronic device according to the embodiment of the present invention includes the display screen assembly according to the above embodiment.

In the cover plate assembly, the display screen assembly and the electronic device of the embodiment of the present invention, the groove is conducive to fixing the sealing ring, so that the sealing ring can seal the gap between the outer surface of the base ring and the installation through hole, which can prevent water , Dust and other sundries enter the electronic device from the gap between the outer surface of the base ring and the installation through hole and affect the normal operation of the electronic device.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic plan view of a cover plate assembly according to an embodiment of the present invention;

Fig. 2 is a schematic cross-sectional view of the II-II direction of the cover assembly of Fig. 1;

Fig. 3 is an enlarged schematic view of part III of the cover assembly of Fig. 2;

4 is a schematic perspective view of an electronic device according to an embodiment of the present invention;

Fig. 5 is a schematic cross-sectional view of the cover plate assembly in Fig. 1 in the V-V direction;

Fig. 6 is a three-dimensional schematic diagram of a cover plate assembly according to an embodiment of the present invention;

Fig. 7 is a three-dimensional schematic diagram of a decorative ring according to an embodiment of the present invention;

Fig. 8 is a schematic cross-sectional view of a decorative ring according to an embodiment of the present invention;

Fig. 9 is a three-dimensional schematic diagram of a support sheet according to an embodiment of the present invention.

Fig. 10 is a schematic cross-sectional view of a display screen assembly according to an embodiment of the present invention.

Description of main component symbols:

Cover assembly 100, electronic device 200;

Cover plate 10, upper surface 11, lower surface 12, installation through hole 13, side wall 131 of installation through hole 13, limit surface 14;

The decorative ring 20, the base ring 21, the outer surface 211 of the base ring 21, the inner surface 212 of the base ring 21, the central hole 213, the bottom surface 214, the groove 215, the abutment portion 22, the abutment surface 221, the guide slope 222, Support edge 23, avoidance hole 231, avoidance groove 232;

Fingerprint identification module 30, package body 31, fingerprint identification chip 32, cover plate 33;

Support sheet 40, support portion 41, perforation 411, fixing portion 42, protrusion 43;

sealing ring 50;

flexible circuit board 60;

Card 70, bayonet 71.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, but should not be construed as limiting the present utility model.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", Orientation indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. Or the positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be configured in a specific orientation, and operation, and therefore cannot be construed as a limitation of the utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection, electrical connection or mutual communication; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the mutual communication of two components role relationship. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "below" a second feature may include direct contact between the first and second features, and may also include the first and second features being in direct contact with each other. The features are not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

The disclosure below provides many different implementations or examples for realizing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. Furthermore, the present disclosure may repeat reference numerals and/or reference letters in different instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art may recognize the use of other processes and/or the use of other materials.

Referring to FIGS. 1-3 , the cover plate assembly 100 according to the embodiment of the present invention includes a cover plate 10 , a decorative ring 20 , a fingerprint identification module 30 and a support piece 40 . The decorative ring 20 is disposed in the cover plate 10 , the fingerprint recognition module 30 is disposed in the decorative ring 20 , and the support piece 40 is fixedly connected with the cover plate 10 and carries the decorative ring 20 .

Please refer to FIG. 4 , the cover assembly 100 according to the embodiment of the present invention can be applied to an electronic device 200 such as a mobile phone, a smart wearable device or a tablet computer. It can be understood that the electronic device 200 includes but not limited to examples of this embodiment.

Specifically, referring to FIG. 3 , the cover plate 10 includes an upper surface 11 and a lower surface 12 . It can be understood that the upper surface 11 of the cover plate 10 is the appearance surface of the cover plate assembly 100 and faces the user. The user can perform gesture operations on the upper surface 11 , such as clicking or sliding, to control the electronic device 200 to implement corresponding functions.

The material of the cover plate 10 may be made of light-transmitting materials such as glass, ceramics or sapphire. Since the cover 10 is used as an input part of the electronic device 200 , the cover 10 is often touched by bumps or scratches. For example, when a user puts the electronic device 200 into a pocket, the cover 10 may be scratched and damaged by a key in the user's pocket.

Therefore, the material of the cover plate 10 can be a material with relatively high hardness, such as the above-mentioned sapphire material. Of course, a protective plate may also be attached to the upper surface 11 of the cover plate 10 to prevent the cover plate 10 from being scratched.

Since the cover 10 is made of light-transmitting material, the user can view the content displayed on the screen of the electronic device 200 through the cover 10 .

It can be understood that the shape of the cover plate 10 can be specifically designed according to the shape of the electronic device 200 , such as a rectangle with rounded corners.

Further, the cover plate 10 is provided with an installation through hole 13 . In this embodiment, the installation through hole 13 is a through hole penetrating through the upper surface 11 and the lower surface 12 .

In this embodiment, the installation through hole 13 is in the shape of an oblong body. Of course, in other embodiments, the installation through hole 13 can be designed in different shapes according to specific requirements, such as a circular or oval shape. Therefore, the example of the shape of the mounting through hole 13 in this embodiment cannot be understood as a limitation of the present invention.

In some embodiments, the decorative ring 20 is disposed in the installation through hole 13 and fixedly connected with the cover plate 10 . The fingerprint identification module 30 is accommodated in the decorative ring 20 and fixedly connected with the decorative ring 20 . For example, the fingerprint recognition module 30 is bonded and fixed with the decorative ring 20 through glue.

Generally, the receiver of the electronic device 200 is disposed on the top area of the electronic device 200 . Therefore, in order to prevent the installation through hole 13 from interfering with the receiver, preferably, the installation through hole 13 is opened at the bottom area of the cover plate 10 , thereby providing a larger design space for the installation through hole 13 . In addition, the installation through hole 13 is opened in the middle of the bottom area of the cover plate 10, so that the cover plate 10 has a substantially symmetrical structure. In this way, the electronic device 200 is more beautiful, and secondly, it is convenient for users to operate.

Please refer to FIG. 3 , FIG. 7 and FIG. 8 together. In some embodiments, the decorative ring 20 includes a base ring 21 and an abutment portion 22 extending outward from the top of the base ring 21 . The abutment portion 22 includes a The abutting surface 221 connected to the outer surface 211 of the ring 21, the angle between the abutting surface 221 and the outer surface 211 of the base ring 21 is a right angle or an obtuse angle, and the abutting surface 221 abuts against the cover plate 10 to limit the decorative ring 20 Move down relative to the cover plate 10.

In this way, since the decorative ring 20 can abut against the cover plate 10 through the abutting surface 221 , the downward movement of the decorative ring 20 relative to the cover plate 10 is restricted, which is beneficial to user experience.

Specifically, the intersection of the side wall 131 of the installation through hole 13 and the upper surface 11 is obliquely connected to form a limiting surface 14, the limiting surface 14 matches the abutting surface 221, and the abutting surface 221 abuts on the limiting surface 14 .

In this way, the limiting surface 14 can allow the decorative ring 20 to be accommodated in the installation through hole 13 , thereby making the electronic device 200 more beautiful.

In some embodiments, the abutting portion 22 includes a guiding inclined surface 222 opposite to the abutting surface 221 , the guiding inclined surface 222 is connected to the inner surface 212 of the base ring 21 and slopes downward toward the inner surface 212 of the base ring 21 .

In this way, the guide slope 222 can guide the user's finger to smoothly enter the base ring 21 for fingerprint recognition operation, which can improve the accuracy of the user's fingerprint recognition operation. Further, a shiny metal layer (such as a chromium layer) can be plated on the guide slope 222 to make the base ring 21 more beautiful.

It can be understood that the guide slope 222 is an annular surface, which is convenient for the user to insert fingers into the base ring 21 from various directions to press the fingerprint recognition module 30 to perform fingerprint recognition operations.

In some embodiments, the outer surface 211 of the base ring 21 is formed with a groove 215 extending along the circumference of the base ring 21 . Further, the cover assembly 100 includes a sealing ring 50 disposed in the groove 215 , and the sealing ring 50 seals the gap between the outer surface 211 of the base ring 21 and the installation through hole 13 . The sealing ring 50 is, for example, a silicone sealing ring.

In this way, the groove 215 is conducive to fixing the sealing ring 50, so that the sealing ring 50 can seal the gap between the outer surface 211 of the base ring 21 and the installation through hole 13, so that water, dust and other sundries can be prevented from entering the base ring 21. The gap between the outer surface 211 and the installation through hole 13 enters into the electronic device 200 and affects the normal operation of the electronic device 200 .

In some embodiments, the decorative ring 20 includes a supporting edge 23 extending inward from the bottom of the inner surface 212 of the base ring 21 , and further, the fingerprint identification module 30 is supported on the supporting edge 23 . In this way, the supporting edge 23 can support and position the fingerprint recognition module 30 , thereby improving the assembly efficiency of the fingerprint recognition module 30 and the decorative ring 20 .

That is to say, the fingerprint identification module 30 is supported on the supporting edge 23 . When the fingerprint recognition module 30 is installed into the base ring 21, the fingerprint recognition module 30 can be pressed from top to bottom, if the position of the fingerprint recognition module 30 can no longer be moved, it means that the fingerprint recognition module 30 has leaned against the supporting edge 23, And installed to the predetermined location.

It can be understood that the base ring 21 is formed with a central hole 213 , and the supporting edge 23 is located in the central hole 213 . The central hole 213 may be in the shape of a straight column, or in other words, the inner surface 212 of the base ring 21 is in the shape of a straight line, so that the fingerprint recognition module 30 can be quickly installed into the central hole 213 .

The central hole 213 and the supporting edge 23 can be formed by removing material from the part by cutting, or by casting or the like.

In order to ensure the strength of the decorative ring 20 , preferably, the material of the decorative ring 20 is metal, such as stainless steel, so as to meet the strength requirement of the decorative ring 20 , and also has corrosion resistance, which improves the service life of the decorative ring 20 . Of course, the decorative ring 20 can also be made of other materials such as plastic.

In some embodiments, the supporting edge 23 is perpendicular to the inner side 212 of the base ring 21 .

In this way, the supporting edge 23 is easy to form, and the manufacturing cost of the base ring 21 can be reduced. In addition, when manufacturing the cover plate assembly 100, the supporting edge 23 is located at a horizontal position, and the inner side 212 of the base ring 21 is located at a vertical position, so that the surface of the fingerprint recognition module 30 matched with the supporting edge 23 is a horizontal plane, which can simplify support in The structure of the fingerprint identification module 30 on the support side 23.

In some embodiments, the base ring 21 includes a bottom surface 214 , and the lower surface of the supporting edge 23 is flush with the bottom surface 214 of the base ring 21 .

In the base ring 21 of the same height, as set above, a larger accommodating space can be formed in the base ring 21 to ensure that the fingerprint identification module 30 can be accommodated in the base ring 21 .

In other words, when the thickness of the fingerprint identification module 30 is constant, the height of the base ring 21 is relatively small, so that the thickness of the cover assembly 100 can be reduced, thereby providing a design basis for reducing the thickness of the electronic device 200 .

Please refer to FIG. 7 and FIG. 8 , in some embodiments, the supporting edge 23 is formed with an escape hole 231 communicating with the central hole 213 of the base ring 21 .

Please refer to FIG. 5 and FIG. 6 , in this way, the escape hole 231 is beneficial to the wiring layout of the flexible circuit board 60 connected with the fingerprint identification module 30 . For example, the flexible circuit board 60 can pass through the escape hole 231 to connect with the fingerprint recognition module 30 .

In some embodiments, the avoidance hole 231 is in the shape of a rounded rectangle, and the long side wall of the escape hole 231 is provided with an avoidance groove 232 communicating with the avoidance hole 231 , and the avoidance groove 232 extends along the length direction of the avoidance hole 231 .

For example, as shown in FIG. 6 , after the flexible circuit board 60 is connected to the fingerprint recognition module 30 , it first extends toward the avoidance groove 232 , and then bends around. Therefore, the escape groove 232 can prevent the flexible circuit board 60 from interfering with the sidewall of the avoidance hole 231 , which is beneficial to the wiring of the flexible circuit board 60 .

Please refer to FIG. 5 again. In some embodiments, the fingerprint identification module 30 includes a package body 31 and a fingerprint identification chip 32 .

Specifically, when the user operates to unlock the electronic device 200 with a fingerprint, the user may place a finger on a position corresponding to the fingerprint recognition chip 32 . The signal of the fingerprint identification chip 32 passes through the package body 31 to collect and identify the user's fingerprint pattern, and the user's fingerprint pattern is matched with the pre-stored fingerprint pattern, and if the matching is successful, the electronic device 200 is unlocked.

It can be understood that the surface of the fingerprint recognition chip 32 facing the user's finger is provided with a sensing pixel array to collect the user's fingerprint pattern. Encapsulating the fingerprint identification chip 32 in the package body 31 can reduce the influence of other interference signals on the sensing pixel array when collecting fingerprint patterns, so as to improve the accuracy of identification.

In some embodiments, the top surface of the fingerprint recognition module 30 is provided with a cover plate 33 . For example, the cover plate 33 is fixed on the top surface of the fingerprint recognition module 30 by glue.

The user may press the cover plate 33 with a finger when performing a fingerprint recognition operation. The cover plate 33 can protect the package body 31 from damage, so as to improve the reliability of the fingerprint identification module 30 .

Since the cover plate 33 is often touched, the cover plate 33 can be made of a material with higher hardness, such as the sapphire material mentioned above.

In some embodiments, the shape and size of the cover plate 33 match the shape and size of the top surface of the fingerprint identification module 30 .

For example, the shape of the top surface of the fingerprint identification module 30 is oblong, and the shape of the cover plate 33 is also oblong. The area of the cover plate 33 is slightly larger than the area of the top surface of the fingerprint recognition module 30 . Therefore, the cover plate 33 can completely cover the fingerprint recognition module 30 .

5 and 8, in some embodiments, the support piece 40 includes a support portion 41 extending from the periphery of the installation through hole 13 to the center of the through hole, the decorative ring 20 is arranged in the installation through hole 13 and The supporting part 41 is fixedly connected. For example, the decorative ring 20 is fixedly connected to the supporting portion 41 by bonding. In another example, the decorative ring 20 is fixedly connected to the support portion 41 by welding.

In this way, since the support piece 40 is fixedly connected to the cover plate 10, and the decorative ring 20 is fixedly connected to the support plate 40, the movement of the decorative ring 20 relative to the cover plate 10 can be prevented, which is beneficial for the user to press the fingerprint recognition module 30 in the decorative ring 20 for fingerprint recognition.

In some embodiments, the supporting piece 40 includes a fixing portion 42 fixed on the lower surface 12 of the cover plate 10 , and the fixing portion 42 is fixedly connected to the supporting portion 41 .

In other words, the support piece 40 first extends from the periphery of the installation through hole 13 to the periphery of the installation through hole 13 , and then extends from the periphery of the installation through hole 13 to the center of the installation through hole 13 .

Fixing the support piece 40 on the lower surface 12 of the cover plate 10 facilitates the fixed connection between the support piece 40 and the cover plate 10 , for example, the support piece 40 may be fixed on the lower surface 12 of the cover plate 10 by bonding.

In some embodiments, the fixing portion 42 of the support piece 40 is disposed around the installation through hole 13 , and the support portion 41 extends around the circumference of the installation through hole 13 . In this way, the contact area of the supporting portion 41 and the decorative ring 20 is large, which is beneficial for the stable support of the decorative ring 20 on the supporting portion 41 .

In some embodiments, the support portion 41 is formed with a protrusion 43 protruding toward the decoration ring 20 , and the decoration ring 20 leans against the protrusion 43 .

In this way, the protrusion 43 can increase the strength of the support part 41 , and when the fingerprint identification module 30 is pressed, the support part 41 is not easily deformed. In one example, the support piece 40 is made of metal sheet, and the protrusion 43 is a molding of the support piece 40 . In this embodiment, the protrusions 43 are distributed into a plurality of protrusions 43 at intervals around the circumference of the support portion 41 , for example, in FIG. 9 , the protrusions 43 are distributed into two protrusions 43 at intervals.

Please refer to FIG. 3 and FIG. 6 , in some embodiments, the support portion 41 is formed with a perforation 411 , the cover plate assembly 100 includes a card 70 , the card 70 is bent to form a bayonet 71 , the card 70 is fixedly connected to the decorative ring 20 , And clamp the support part 41 from the edge of the perforation 411 through the bayonet 71 to limit the movement of the decoration ring 20 relative to the support piece 40 .

In this way, the card 70 can prevent the decorative ring 20 from moving, which is beneficial for the fingerprint identification module 30 to perform fingerprint identification.

In this embodiment, the number of cards 70 is two, and the two cards 70 are respectively clamped at both ends of the through hole 411 in the longitudinal direction. It can be understood that, in other implementation manners, the number and clamping positions of the cards 70 may be determined according to actual conditions.

In one example, when assembling the cover plate assembly 100, the support piece 40 can be fixed on the lower surface 12 of the cover plate 10, and then the decorative ring 20 with the card 70 fixed before being folded in half is installed in the installation through hole 13 , and pass the card 70 through the perforation 411, fold the card 70 in half after the decorative ring 20 is supported on the supporting part 41, so that the card 70 forms a bayonet 71 and clamps the supporting part 41, and finally installs the fingerprint identification module 30 on the decorative ring 20 within the base ring 21.

Please refer to FIG. 10 , the present invention also provides a display screen assembly 300 , the display screen assembly 300 includes the cover plate assembly 100 of the embodiment and a display screen 302 , and the display screen 302 is arranged on the lower surface 12 of the cover plate 10 .

In the description of this specification, descriptions referring to the terms "one embodiment", "certain embodiments", "exemplary embodiments", "example", "specific examples", or "some examples" are meant to be combined with The specific features, structures, materials or features described in the above embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications, the scope of the present invention is defined by the claims and their equivalents.

Claims (12)

1. A cover plate assembly, characterized in that, comprising: A cover plate, the cover plate is provided with an installation through hole; a decorative ring disposed in the installation through hole, the decorative ring includes an outer surface opposite to the side wall of the installation through hole, the outer surface is formed with a groove extending along the circumference of the decorative ring; and A sealing ring, the sealing ring is arranged in the groove to seal the gap between the side wall of the installation through hole and the outer surface. 2. The cover assembly of claim 1, wherein the bezel comprises: a base ring comprising the outer side; and The abutment portion extending outward from the top of the base ring, the abutment portion includes an abutment surface connected to the outer surface of the base ring, the abutment surface and the outer surface of the base ring are clamped The angle is a right angle or an obtuse angle, and the abutting surface abuts against the cover plate to limit the downward movement of the decorative ring relative to the cover plate. 3. The cover plate assembly according to claim 2, wherein the abutting portion comprises a guiding inclined surface opposite to the abutting surface, and the guiding inclined surface is connected to the inner surface of the base ring and faces toward The inner side of the base ring is inclined downward. 4. The cover plate assembly of claim 2, wherein the bezel includes a support edge extending inwardly from a bottom of the inner side of the base ring. 5. The cover plate assembly of claim 4, wherein the support edge is perpendicular to the inner side of the base ring. 6. The cover plate assembly according to claim 4, wherein the base ring includes a bottom surface, and the lower surface of the supporting edge is flush with the bottom surface. 7. The cover plate assembly according to claim 4, wherein the supporting edge is formed with an escape hole communicating with the central hole of the base ring. 8. The cover plate assembly according to claim 7, characterized in that, the avoidance hole is in the form of a rounded rectangle, and the long side wall of the avoidance hole is provided with an avoidance groove communicating with the avoidance hole, and the avoidance groove is along the The avoidance hole extends in the length direction. 9. The cover plate assembly according to claim 2, wherein the cover plate comprises an upper surface, and the intersection of the side wall of the installation through hole and the upper surface is obliquely connected to form a limiting surface, so The limiting surface matches the abutting surface, and the abutting surface abuts against the limiting surface. 10. The cover plate assembly according to claim 1, wherein the sealing ring comprises a silicone sealing ring. 11. A display assembly, characterized in that it comprises: The cover assembly of any one of claims 1-10; and A display screen, the display screen is arranged on the lower surface of the cover plate. 12. An electronic device, comprising the display screen assembly of claim 11.