A cover plate and a communication device

Abstract

The embodiment of the application relates to the technical field of wireless charging, and discloses a cover plate and communication equipment, the cover plate comprises a cover plate body, a wireless charging module and a covering film, the cover plate body is provided with an accommodating window, the wireless charging module is embedded in the accommodating window, the wireless charging module comprises a charging coil and a shielding layer, the shielding layer is arranged below the charging coil and is stacked with the charging coil, the shielding layer is tightly embedded with the inner wall of the accommodating window, and the covering film is arranged above the accommodating window and covers the wireless charging module. In the above manner, the distance between the charging coil in the wireless charging module and an external transmitting end can be greatly shortened, and the electromagnetic coupling strength of the system is effectively improved.

Description

Technical Field

[0001] This application relates to the field of wireless charging technology, and in particular to a cover plate and a communication device. Background Technology

[0002] With the evolution of the consumer electronics market, the trend towards thinner and lighter mobile phones has become a core competitive strategy and technological development direction for major manufacturers. However, the widespread application of wireless charging technology has brought significant technical challenges to this trend. Wireless charging systems occupy considerable thickness space inside mobile phones, creating a fundamental technical contradiction with the goal of thinner and lighter designs.

[0003] During the implementation of this application, the inventors discovered that: Currently, the industry mainly adopts the method of compressing the thickness of the mobile phone cover to achieve the overall thinness of the product. However, the solution of compressing the thickness of the cover is fundamentally limited by the physical properties of the material. Further thinning will lead to insufficient strength of the cover structure, increasing the risk of breakage of the product in daily use. Utility Model Content

[0004] The main technical problem solved by this application is to provide a cover plate that, by setting an accommodating window and a covering film, significantly shortens the distance between the charging coil in the wireless charging module and the external transmitter, effectively improving the electromagnetic coupling strength of the system. The stacked arrangement of the shielding layer and the charging coil, as well as the tight fit with the inner wall of the accommodating window, further optimizes the coupling effect, breaking through the technical problem in the prior art that the coupling cannot be further improved due to the limitation of the cover plate thickness.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application embodiment is: providing a cover plate, including a cover plate body, a wireless charging module, and a cover film. The cover plate body has an accommodating window, and the wireless charging module is embedded in the accommodating window. The wireless charging module includes a charging coil and a shielding layer. The shielding layer is disposed below the charging coil and stacked with the charging coil. The shielding layer is tightly fitted with the inner wall of the accommodating window, and the cover film is disposed above the accommodating window and covers the wireless charging module.

[0006] Optionally, the wireless charging module further includes a positioning element disposed within the shielding layer, and the positioning element is assembled and connected to the charging coil and the shielding layer.

[0007] Optionally, there are multiple positioning elements, which are distributed circumferentially along the charging coil.

[0008] Optionally, each of the positioning elements is integrally formed with the shielding layer.

[0009] Optionally, a filling layer is provided between the cover film and the wireless charging module, and the filling layer fills the cavity formed by the cover film and the wireless charging module.

[0010] Optionally, the receiving window is provided with a stepped structure, which is used to support the wireless charging module and define the embedding depth of the wireless charging module.

[0011] Optionally, the outer peripheral surface of the shielding layer is provided with a protruding structure, which is interference-fitted with the inner wall of the receiving window to achieve a tight fit.

[0012] Optionally, the charging coil is provided with lead-out terminals that extend from the receiving window to a predetermined connection area of ​​the cover body.

[0013] To solve the above-mentioned technical problems, another technical solution adopted in the embodiments of this application is to provide a communication device, including any of the above-mentioned cover plates.

[0014] This application provides a cover plate, including a cover plate body, a wireless charging module, and a cover film. The cover plate body has an accommodating window, and the wireless charging module is embedded in the accommodating window. The wireless charging module includes a charging coil and a shielding layer. The shielding layer is disposed below the charging coil and stacked with it. The shielding layer is tightly fitted with the inner wall of the accommodating window. The cover film is disposed above the accommodating window and covers the wireless charging module. Through the embedded design, the distance between the charging coil in the wireless charging module and the external transmitter is significantly shortened, effectively improving the electromagnetic coupling strength of the system. The stacking of the shielding layer and the charging coil, as well as the tight fitting with the inner wall of the accommodating window, further optimizes the coupling effect, overcoming the technical problem in the prior art where the thickness of the cover plate limits further improvement in coupling. Furthermore, the complete coverage design of the cover film over the wireless charging module ensures the stability and mechanical strength of the overall cover plate structure. Through reasonable spatial configuration and component layout, this application achieves the goal of product thinness while maintaining the reliability of the cover plate, effectively improving the user's charging experience and product usage. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the cover plate according to an embodiment of this application;

[0017] Figure 2 This is another schematic diagram of the cover plate in an embodiment of this application.

[0018] The reference numerals in the detailed embodiments are as follows: 100, cover plate; 10, cover plate body; 101, receiving window; 20, wireless charging module; 21, charging coil; 22, shielding layer; 30, covering film; 40, positioning component. Detailed Implementation

[0019] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0021] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0022] Please see Figure 1 The cover plate 100 includes: a cover plate body 10, a wireless charging module 20, and a cover film 30.

[0023] The cover body 10 is made of conventional mobile phone cover material and has a receiving window 101 at a predetermined position. The receiving window 101 is circular in shape, and its diameter is determined according to the external dimensions of the wireless charging module 20 to ensure that the wireless charging module 20 can be fully embedded in it. The depth of the receiving window 101 is set according to the actual situation to ensure that the embedded wireless charging module 20 does not protrude from the outer surface of the cover body 10.

[0024] Please see Figure 2 The wireless charging module 20 is embedded within the receiving window 101 and includes a charging coil 21 and a shielding layer 22. The charging coil 21 adopts a flat spiral structure. The shielding layer 22 is disposed below the charging coil 21 and stacked with it, and the two are fixedly connected by adhesive bonding. The outer peripheral surface of the shielding layer 22 is tightly fitted with the inner wall of the receiving window 101, and the stability and reliability of the connection are ensured by interference fit.

[0025] A cover film 30 is positioned above the receiving window 101 and completely covers the wireless charging module 20. The edge of the cover film 30 is connected to the cover plate body 10 by ultrasonic welding to form a sealed encapsulation structure. Through this design, the wireless charging module 20 is completely protected inside the cover plate 100 structure, forming an integrated cover plate 100 product.

[0026] like Figure 2 As shown. The wireless charging module 20 also includes a positioning element 40, which is disposed inside the shielding layer 22.

[0027] In the embodiment of the application, the positioning element 40 is a permanent magnet. Preferably, there are four positioning elements 40, which are evenly distributed around the circumference of the charging coil 21, with a central angle of 90 degrees between adjacent positioning elements 40. Each positioning element 40 is mechanically assembled and connected to the charging coil 21 and the shielding layer 22 to ensure that it will not shift during the use of the cover plate 100. Each positioning element 40 is directly embedded during the injection molding process of the shielding layer 22, forming an integral structure with the shielding layer 22. Specifically, the installation position of the positioning element 40 is preset in the injection mold of the shielding layer 22, and the positioning element 40 is pre-placed in the corresponding position of the mold before injection molding. Through this process, a firm mechanical connection is formed between the positioning element 40 and the shielding layer 22, avoiding positioning deviation problems that may occur during subsequent assembly. The magnetic pole direction of the positioning element 40 is uniformly set so that the N pole faces the charging coil 21 side and the S pole faces the cover plate body 10 side, so as to form a stable magnetic adsorption positioning effect with the corresponding positioning magnet of the external transmitter. When the cover plate 100 approaches the external wireless charging transmitter, the positioning element 40 can generate a magnetic attraction with the positioning magnet of the transmitter, guiding the two to achieve precise alignment and improving the efficiency and stability of wireless charging.

[0028] In this embodiment, a filling layer (not shown) is provided between the cover film 30 and the wireless charging module 20, and the filling layer (not shown) fills the cavity formed by the cover film 30 and the wireless charging module 20.

[0029] The filler layer (not shown) is made of a rigid polymer colloid material, specifically epoxy resin or polyurethane colloid. The filler layer (not shown) is injected into the cavity using a vacuum injection process to ensure complete filling of all voids within the cavity and prevent air bubbles. The thickness of the filler layer (not shown) is determined based on the specific dimensions of the cavity, typically ranging from 0.5 mm to 2 mm. After filling, the filler layer (not shown) forms a strong mechanical bond with the cover film 30 and the wireless charging module 20, significantly improving the overall structural strength of the area containing the window 101. The filler layer (not shown) effectively compensates for any potential strength reduction in the cover body 10 due to the window 101, making the mechanical properties of the entire cover 100 comparable to a traditional cover 100 without a window. The filler layer (not shown) also provides cushioning, absorbing external impacts and dispersing stress concentration, further enhancing the reliability of the cover 100 in drop tests and daily use. Meanwhile, the addition of a filler layer (not shown) also helps improve the heat dissipation performance of the wireless charging module 20 by increasing the heat conduction path to optimize temperature distribution.

[0030] In this embodiment, the receiving window 101 is provided with a stepped structure (not shown), which supports the wireless charging module 20 and defines the embedding depth of the wireless charging module 20. The stepped structure (not shown) includes an upper stepped surface and a lower stepped surface, with a step height difference between the two stepped surfaces. The diameter of the upper stepped surface is larger than the outer diameter of the wireless charging module 20, and the diameter of the lower stepped surface is the same as the outer diameter of the wireless charging module 20, forming an interference fit. The step height difference is set to 10% to 20% of the thickness of the wireless charging module 20 to ensure that the wireless charging module 20 can be stably supported on the stepped structure (not shown). When the wireless charging module 20 is embedded in the receiving window 101, its bottom contacts the lower stepped surface 104 and is supported on the stepped structure (not shown), and its outer peripheral surface is tightly fitted with the inner wall of the lower stepped surface 104. The embedding depth of the wireless charging module 20 is precisely controlled by the limiting effect of the stepped structure (not shown), ensuring that the working surface of the charging coil 21 and the outer surface of the cover plate body 10 maintain a preset distance relationship.

[0031] In this embodiment, the outer peripheral surface of the shielding layer 22 is provided with a protruding structure (not shown in the figure), and the protruding structure is interference-fitted with the inner wall of the receiving window 101 to achieve a tight fit.

[0032] The raised structure adopts the form of annular protrusions and is continuously arranged along the circumferential direction of the outer peripheral surface of the shielding layer 22. The cross-sectional shape of the raised structure is trapezoidal, and the number of raised structures 221 is set to 2 to 4, with each raised structure 221 evenly distributed along the height direction of the shielding layer 22.

[0033] The inner wall of the receiving window 101 is provided with an annular groove that matches the protruding structure. When the shielding layer 22 is embedded in the receiving window 101, the protruding structure and the annular groove achieve an interference fit, generating a radial preload force to ensure a tight fit between the shielding layer 22 and the inner wall of the receiving window 101. This interference fit design eliminates any gaps that may exist between the shielding layer 22 and the receiving window 101, preventing loosening or displacement of the wireless charging module 20 during use. Simultaneously, the interference fit provides a good sealing effect, preventing external moisture or foreign objects from entering the receiving window 101, thus improving the protective performance and service life of the cover plate 100.

[0034] In this embodiment, the charging coil is provided with lead-out terminals (not shown), which extend from the receiving window to a preset connection area of ​​the cover body 10, providing a reliable electrical interface for the wireless charging coil 21.

[0035] This application provides a cover plate 100, including a cover plate body 10, a wireless charging module 20, and a cover film 30. The cover plate body 10 has a receiving window 101. The wireless charging module 20 is embedded in the receiving window 101. The wireless charging module 20 includes a charging coil 21 and a shielding layer 22. The shielding layer 22 is disposed below the charging coil 21 and stacked with the charging coil 21. The shielding layer 22 is tightly fitted with the inner wall of the receiving window 101. The cover film 30 is disposed above the receiving window 101 and covers the wireless charging module 20. Through the embedded design, the distance between the charging coil 21 in the wireless charging module 20 and the external transmitter is greatly shortened, effectively improving the electromagnetic coupling strength of the system. The stacking of the shielding layer 22 and the charging coil 21, as well as their tight fit with the inner wall of the receiving window 101, further optimizes the coupling effect, overcoming the technical problem in the prior art where the thickness of the cover plate 100 limits the ability to further improve coupling. Furthermore, the complete coverage design of the cover film 30 over the wireless charging module 20 ensures the stability and mechanical strength of the overall structure of the cover plate. Through reasonable spatial configuration and component layout, this application achieves the goal of product thinness while maintaining the reliability of the cover plate 100, effectively improving the user's charging experience and product usage.

[0036] This application also provides an embodiment of a communication device, which includes the cover plate 100 described in any of the foregoing embodiments. Specifically, the communication device is a smartphone, which includes a main frame, a display screen, a battery pack, a main control circuit board, and the cover plate 100. The cover plate 100 serves as the back cover of the smartphone and is connected and fixed to the main frame via a snap-fit ​​structure. The snap-fit ​​structure is distributed around the perimeter of the cover plate 100 to ensure a reliable connection between the cover plate 100 and the main frame. The wireless charging module 20 embedded in the cover plate 100 is electrically connected to the wireless charging control circuit on the main control circuit board via lead-out terminals, realizing the system integration of wireless charging functionality.

[0037] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A cover plate, characterized in that, include: The cover plate body has an accommodating window; A wireless charging module is embedded in the receiving window. The wireless charging module includes a charging coil and a shielding layer. The shielding layer is disposed below the charging coil and stacked with the charging coil. The shielding layer is tightly fitted with the inner wall of the receiving window. A covering film is disposed above the receiving window and covers the wireless charging module.

2. The cover plate according to claim 1, characterized in that, The wireless charging module also includes a positioning element, which is disposed within the shielding layer and is assembled and connected to the charging coil and the shielding layer.

3. The cover plate according to claim 2, characterized in that, There are multiple positioning elements, which are distributed circumferentially along the charging coil.

4. The cover plate according to claim 3, characterized in that, Each of the positioning components is integrally formed with the shielding layer.

5. The cover plate according to claim 1, characterized in that, The covering membrane is connected to the cover plate body to form an integrated structure.

6. The cover plate according to claim 1, characterized in that, A filling layer is provided between the cover film and the wireless charging module, and the filling layer fills the cavity formed by the cover film and the wireless charging module.

7. The cover plate according to claim 1, characterized in that, The receiving window is provided with a stepped structure, which is used to support the wireless charging module and limit the embedding depth of the wireless charging module.

8. The cover plate according to claim 1, characterized in that, The outer peripheral surface of the shielding layer is provided with a protruding structure, which is interference-fitted with the inner wall of the receiving window to achieve a tight fit.

9. As described in claim 7, characterized in that, The charging coil is provided with lead-out terminals, which extend from the receiving window to a predetermined connection area of ​​the cover body.

10. A communication device, characterized in that, Includes the cover plate as described in any one of claims 1-9.

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