Keyboard protectors and electronic devices

Abstract

This application relates to a keyboard protector and an electronic device. The electronic device includes a cavity antenna, a frame, and a screen. The frame includes a radiating segment facing the opening of the cavity antenna, and a radiating gap is formed between the radiating segment and the screen. The keyboard protector includes a housing and a metal keyboard. The inner side of the housing is used to connect the electronic device. The metal keyboard includes a keyboard surface and a placement surface disposed opposite each other. The metal keyboard includes an antenna window extending from the placement surface to the keyboard surface. When the keyboard protector and the electronic device are assembled and the keyboard protector is in a closed state, at least a portion of the projected area of ​​the radiating gap is located within the antenna window. The design of the keyboard protector in this application allows the antenna signal to radiate outward through the antenna window, effectively avoiding interference from the metal keyboard to the cavity antenna signal, ensuring the radiation efficiency of the antenna signal, improving the user experience, and enhancing the electromagnetic compatibility of the device.

Description

Technical Field

[0001] This application relates to the field of antennas, and more particularly to a keyboard protector and an electronic device. Background Technology

[0002] With the advancement of technology, protective cases have become increasingly sophisticated, with those featuring touch-sensitive keyboards being particularly popular. However, magnetic keyboard cases often have a touch-sensitive control panel, with the keyboard surface entirely made of metal. Therefore, if a user closes the keyboard case while downloading files, the device's screen will be completely obstructed by the metal keyboard panel, leading to significant interference with antenna performance. Utility Model Content

[0003] This application provides a keyboard protector and an electronic device to address some or all of the shortcomings in the related art.

[0004] The keyboard protection component of this application includes:

[0005] A housing, the inner side of which is used for connecting electronic devices; and

[0006] A metal keyboard, comprising a keyboard surface and a placement surface disposed opposite each other, and the metal keyboard including an antenna window extending from the placement surface to the keyboard surface;

[0007] When the keyboard protector and the electronic device are in an assembled state and the keyboard protector is in a closed state, at least a portion of the projection area of ​​the radiation gap is located within the antenna window.

[0008] Optionally, the antenna window includes a plurality of antenna gaps, which are spaced apart along the direction of displacement current flow of the radiating frame segment.

[0009] Optionally, the spacing between any two adjacent antenna gaps is the same.

[0010] Optionally, the distance between the center positions of any two adjacent antenna gaps is a first length; wherein the magnitude of the first length is equal to the wavelength of the cavity antenna.

[0011] Optionally, when the keyboard protector and the electronic device are in an assembled state and the keyboard protector is in a closed state, the projection area of ​​the radiation gap includes a first edge and a second edge disposed opposite to each other in the direction of displacement current flow; the distance between the first edge and the center position of the nearest antenna gap is a second length; or, the distance between the second edge and the center position of the nearest antenna gap is a second length; wherein, the second length is 1 / 4 of the wavelength of the cavity antenna.

[0012] Optionally, the antenna window includes a single antenna opening, and at least a portion of the projected area of ​​the radiation slot is located within the antenna opening.

[0013] Optionally, the antenna window is recessed from the side of the metal keyboard to form an antenna groove; when the keyboard protector is in a closed state, the antenna window is used to expose the radiation gap from the antenna groove.

[0014] Optionally, the entire projection area of ​​the radiation slit is located within the antenna window.

[0015] Optionally, it also includes a filling medium filling the antenna window;

[0016] Wherein, the filling medium is made of FR-4 grade epoxy resin material; and / or, the filling medium is made of polybutylene terephthalate material.

[0017] The electronic device of this application includes a keyboard protector as described above; wherein, the electronic device further includes a cavity antenna, a frame and a screen, the frame includes a radiating frame segment facing the opening of the cavity antenna, a radiating gap is formed between the radiating frame segment and the screen, and the cavity antenna is used to radiate antenna signals.

[0018] The technical solutions provided by the embodiments of this application may include the following beneficial effects:

[0019] As can be seen from the above embodiments, the metal keyboard of this application is designed with an antenna window. When the keyboard protective component is in a closed state, at least part of the projection area of ​​the radiation gap falls into the antenna window, thereby enabling the antenna signal to radiate outward through the antenna window. This effectively avoids interference of the metal keyboard with the cavity antenna signal, ensures the radiation efficiency of the antenna signal, and improves the user experience and electromagnetic compatibility of the device.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an electronic device according to an exemplary embodiment;

[0023] Figure 2 This is a schematic diagram illustrating a keyboard protector in a closed state according to an exemplary embodiment;

[0024] Figure 3 This is a schematic diagram of the projection area of ​​a radiation slit according to an exemplary embodiment;

[0025] Figure 4 This is a simplified structural diagram of an antenna gap according to an exemplary embodiment;

[0026] Figure 5 This is a schematic diagram illustrating the displacement current flow direction of a radial frame segment according to an exemplary embodiment;

[0027] Figure 6 This is a simplified structural diagram of an antenna recess according to an exemplary embodiment.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Electronic device; 11. Cavity antenna; 12. Screen; 13. Radiation frame segment; 14. Radiation slot; 141. First edge; 142. Second edge; 15. Keyboard protector; 151. Housing; 152. Metal keyboard; 1521. Keyboard surface; 1522. Placement surface; 153. Antenna window; 1531. Antenna gap; 1532. Antenna groove; S1. First length; S2. Second length. Detailed Implementation

[0030] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0031] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0032] Figure 1 This is a schematic diagram of the structure of an electronic device 1 according to an exemplary embodiment, with reference to... Figure 1The electronic device 1 of this application includes a keyboard protector 15, a cavity antenna 11, a frame and a screen 12. The frame includes a radiating frame segment 13 facing the opening of the cavity antenna 11. A radiating gap 14 is formed between the radiating frame segment 13 and the screen 12. The cavity antenna 11 is used to radiate antenna signals.

[0033] In this application, the opening of the cavity antenna 11 faces the frame, so that when the cavity antenna 11 is working, a coupling current is generated at the corresponding position of the frame. This position serves as the radiating frame segment 13, forming a radiating gap 14 between it and the screen 12 of the electronic device 1, thereby radiating the signal of the cavity antenna 11 outward from the radiating gap 14, ensuring the radiation efficiency of the cavity antenna 11.

[0034] Figure 2 This is a schematic diagram showing the keyboard protector 15 in a closed state according to an exemplary embodiment. Figure 3 This is a schematic diagram of the projected area of ​​the radiation slit 14 according to an exemplary embodiment, in conjunction with... Figure 1 , Figure 2 and Figure 3 The keyboard protector 15 of this application includes a housing 151 and a metal keyboard 152. The inner side of the housing 151 is used to connect the electronic device 1. The metal keyboard 152 includes a keyboard surface 1521 and a placement surface 1522 disposed opposite to each other. The metal keyboard 152 includes an antenna window 153 extending from the placement surface 1522 to the keyboard surface 1521. When the keyboard protector 15 and the electronic device 1 are in an assembled state and the keyboard protector 15 is in a closed state, at least a portion of the projection area of ​​the radiation slit 14 is located within the antenna window 153.

[0035] refer to Figure 2 During the use of the electronic device 1, when the user closes the keyboard protector 15 (i.e., adjusts the keyboard protector 15 to a closed state), the screen 12 of the electronic device 1 is covered by the keyboard surface 1521 of the metal keyboard 152. Since the radiation gap 14 is located on the side of the screen 12 of the electronic device 1, the antenna signal of the electronic device 1 will be interfered with or even shielded by the metal keyboard 152. However, this application designs an antenna window 153 on the metal keyboard 152. When the keyboard protector 15 is closed, at least a portion of the projection area of ​​the radiation gap 14 falls into the antenna window 153, allowing the antenna signal to radiate outward through the antenna window 153. This effectively avoids interference from the metal keyboard 152 to the cavity antenna 11 signal, ensures the radiation efficiency of the antenna signal, and improves the user experience and electromagnetic compatibility of the device.

[0036] Of course, in an optional embodiment, the projection area of ​​the radiating slit 14 can also be designed so that the entire projection area is located within the antenna window 153. This design avoids any obstruction of the antenna signal by the metal keyboard 152, further improving the radiation efficiency of the cavity antenna 11. Especially during the transmission of high-frequency signals (such as WiFi 5G signals), the antenna window 153 can avoid the obstruction and electromagnetic interference of the signal by the metal keyboard 152, significantly reducing the attenuation and distortion of the antenna signal, ensuring antenna performance, further optimizing electromagnetic compatibility, and improving the user experience.

[0037] Figure 4 This is a simplified structural diagram of the antenna gap 1531 according to an exemplary embodiment. Figure 5 This is a schematic diagram illustrating the displacement current J flow direction of the radiation frame segment 13 according to an exemplary embodiment, in conjunction with... Figure 4 and Figure 5 In an optional embodiment, the antenna window 153 includes a plurality of antenna gaps 1531, which are spaced apart along the direction of the displacement current J of the radiating frame segment 13.

[0038] In this embodiment, the keyboard protector 15 designs the antenna window 153 as an array structure composed of multiple antenna gaps 1531. By aligning the arrangement of the antenna gaps 1531 with the direction of the displacement current J of the radiating frame segment 13, the electromagnetic waves of the cavity antenna 11 can not only radiate outward through these antenna gaps 1531, but also form a coupling current through the array design of the antenna gaps 1531, thereby further enhancing the antenna's radiation capability and gain, and significantly improving its radiation efficiency. It should be noted that in practical applications, the number of antenna gaps 1531 can be designed according to the specific signal frequency band and user requirements, thereby ensuring that the antenna signal maintains in-phase radiation when passing through the antenna gaps 1531, thereby further enhancing the antenna's radiation capability and increasing its gain. Therefore, this application does not limit the specific number of antenna gaps 1531.

[0039] In an optional embodiment, the spacing between any two adjacent antenna gaps 1531 is the same.

[0040] In the antenna window 153, the spacing between any two adjacent antenna gaps 1531 is the same, thus forming a uniformly arranged slot array. This optimizes the signal transmission path and ensures that the electromagnetic wave transmission path is consistent within the slot array, thereby achieving in-phase radiation. Simultaneously, the equally spaced slot array also ensures uniform electromagnetic wave radiation, avoiding signal phase shifts or local signal attenuation / enhancement caused by inconsistent gap spacing. Furthermore, the equally spaced design reduces the processing difficulty of the keyboard protector 15, thereby improving production efficiency and product consistency.

[0041] In an optional embodiment, the distance between the center positions of any two adjacent antenna gaps 1531 is a first length S1. The first length S1 is equal to the wavelength of the cavity antenna 11.

[0042] Furthermore, this application designs the spacing of the antenna gap 1531 to be equal to the wavelength of the antenna signal, so that when the cavity antenna 11 is working, the electromagnetic waves radiated by it can resonate in the antenna gap 1531, thereby achieving wavelength matching. Figure 4 As can be seen, this design generates a coupled electric field E and a coupled magnetic field H within the antenna gap 1531, ensuring that the antenna signal radiates in phase in each gap array. This avoids phase shift and distortion of the antenna signal, further improving the antenna's radiation capability and gain. Even when the user closes the keyboard protector 15 during actual use, the antenna signal of the electronic device 1 still maintains good transmission capability, thus ensuring the practicality and reliability of the electronic device 1 and improving the user experience.

[0043] In an optional embodiment, when the keyboard protector 15 is assembled with the electronic device 1 and the keyboard protector 15 is in a closed state, the projection area of ​​the radiation gap 14 includes a first edge 141 and a second edge 142 disposed opposite to each other in the direction of displacement current J. The distance between the first edge 141 and the center position of the nearest antenna gap 1531 is a second length S2, wherein the second length S2 is 1 / 4 of the wavelength of the cavity antenna 11.

[0044] For example, in Figure 4 In the embodiment shown, the wavelength of the antenna signal is defined as λ. The distance from the projection edge of the radiation slot 14 to the center of the nearest antenna gap 1531 is 1 / 4λ. According to the electromagnetic wave transmission theory, this design can generate a coupling current corresponding to the 1 / 4 wavelength resonant mode at the antenna window 153, which can ensure that the incident wave and the reflected wave propagate in phase, thereby further improving the radiation gain of the antenna. This allows the antenna of the electronic device 1 to maintain stable signal transmission even when the keyboard protection component 15 is closed, reducing signal fluctuations and interference.

[0045] Of course, in another optional exemplary embodiment, the distance between the second edge 142 and the center position of the nearest antenna gap 1531 can also be designed to be the second length S2, that is, the distance between the second edge 142 and the antenna gap 1531 can be designed to be 1 / 4λ. Therefore, this application does not limit this.

[0046] In an optional embodiment, the antenna window 153 includes a single antenna opening, and at least a portion of the projected area of ​​the radiation slot 14 is located within the antenna opening.

[0047] In other words, the antenna window 153 is designed as a single opening, the size of which can be determined according to the specific application scenario. For example, the size of the antenna opening can be designed to exceed the projection area of ​​the radiation slot 14, thereby ensuring that the entire projection area of ​​the radiation slot 14 falls within the antenna opening. Alternatively, it can be designed not to exceed the first edge 141, or not to exceed the second edge 142, etc. This application does not impose any limitations on this. The design of a single antenna opening simplifies the manufacturing process of the keyboard protector 15 and reduces production costs.

[0048] Similarly, in another alternative embodiment, the antenna window 153 is recessed from the side of the metal keyboard 152 to form an antenna groove 1532; when the keyboard protector 15 is in the closed state, the antenna window 153 is used to expose the radiation slit 14 from the position of the antenna groove 1532.

[0049] Figure 6 This is a simplified structural diagram of the antenna recess 1532 according to an exemplary embodiment, with reference to... Figure 6 The antenna window 153 of this application can not only be made by opening a hole in the metal keyboard 152, but also by directly recessing the side of the metal keyboard 152 inward to form an antenna groove 1532. This design further eliminates the frame of the metal keyboard 152 at the antenna window 153 position, allowing the radiation gap 14 to be more completely exposed from the antenna groove 1532 when the keyboard protector 15 is closed, further improving the antenna's radiation efficiency and omnidirectionality. Therefore, the specific structure of the antenna window 153 described in this application can be designed according to actual working scenarios and requirements, and this application does not impose any limitations on this.

[0050] In an optional embodiment, the keyboard protector 15 further includes a filling medium filling the antenna window 153. The filling medium is made of FR-4 grade epoxy resin; and / or, the filling medium is made of polybutylene terephthalate (PBT).

[0051] The filling medium is designed to provide support within the antenna window 153, improving its mechanical strength. It also provides excellent insulation and electromagnetic optimization, reducing electromagnetic interference from the metal keyboard 152. The material of the filling medium can be adjusted according to different working scenarios and usage requirements. For example, it can be made of FR-4 grade epoxy resin, polybutylene terephthalate, or a mixture of materials. This allows for adjustments to the physicochemical properties of the filling medium to better meet the requirements of different working environments regarding mechanical properties, electromagnetic properties, and production costs.

[0052] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A keyboard protector, characterized in that, The invention is applied to an electronic device, which includes a cavity antenna, a frame, and a screen. The frame includes a radiating segment facing the opening of the cavity antenna, and a radiating gap is formed between the radiating segment and the screen. The keyboard protector includes: A housing, the inner side of which is used for connecting electronic devices; and A metal keyboard, comprising a keyboard surface and a placement surface disposed opposite each other, and the metal keyboard including an antenna window extending from the placement surface to the keyboard surface; When the keyboard protector and the electronic device are in an assembled state and the keyboard protector is in a closed state, at least a portion of the projection area of ​​the radiation gap is located within the antenna window.

2. The keyboard protector of claim 1, wherein, The antenna window includes multiple antenna gaps, which are spaced apart along the direction of displacement current flow of the radiating frame segment.

3. The keyboard protector of claim 2, wherein, The spacing between any two adjacent antenna gaps is the same.

4. The keyboard protector of claim 3, wherein, The distance between the center positions of any two adjacent antenna gaps is a first length; wherein the magnitude of the first length is equal to the wavelength of the cavity antenna.

5. The keyboard protector of claim 2, wherein, When the keyboard protector and the electronic device are in an assembled state and the keyboard protector is in a closed state, the projection area of ​​the radiation gap includes a first edge and a second edge that are arranged opposite to each other in the direction of displacement current flow; the distance between the first edge and the center position of the nearest antenna gap is a second length; or, the distance between the second edge and the center position of the nearest antenna gap is a second length; wherein, the second length is 1 / 4 of the wavelength of the cavity antenna.

6. The keyboard protector of claim 1, wherein, The antenna window includes a single antenna opening, and at least a portion of the projected area of ​​the radiation slot is located within the antenna opening.

7. The keyboard protector of claim 1, wherein, The antenna window is recessed from the side of the metal keyboard to form an antenna groove; when the keyboard protector is in a closed state, the antenna window is used to expose the radiation gap from the antenna groove.

8. The keyboard protector of claim 1, wherein, The entire projection area of ​​the radiation slit is located within the antenna window.

9. The keyboard protector of claim 1, wherein, It also includes a filling medium filling the antenna window; Wherein, the filling medium is made of FR-4 grade epoxy resin material; and / or, the filling medium is made of polybutylene terephthalate material.

10. An electronic device, comprising: The electronic device includes a keyboard protector as described in any one of claims 1-9; wherein the electronic device further includes a cavity antenna, a frame, and a screen, the frame including a radiating frame segment facing the opening of the cavity antenna, a radiating gap being formed between the radiating frame segment and the screen, and the cavity antenna being used to radiate antenna signals.

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