A mobile phone protective case

Abstract

The utility model provides a kind of mobile phone protective cover, comprising: insulating shell and annular antenna and electronic paper display module being set on the insulating shell;The annular antenna is electrically connected with the electronic paper display module;The insulating shell includes first through-hole, and the first through-hole is used to accommodate the camera of mobile phone;The annular antenna is arranged around the first through-hole.The mobile phone protective cover of the utility model can improve antenna power transmission efficiency, avoid picture failure, and can improve the stability of communication, reduce installation difficulty.

Description

Technical Field

[0001] This utility model relates to the field of mobile phone case technology, and in particular to a mobile phone protective case. Background Technology

[0002] With mobile phones becoming increasingly common in people's daily lives, people typically use protective cases to safeguard them. Currently, mobile phone cases on the market with integrated e-paper displays achieve the effect of showing specific patterns by incorporating an e-paper screen into the case.

[0003] Existing phone cases with integrated e-paper displays use an e-paper display to communicate with the phone's NFC antenna via a Near Field Communication (NFC) antenna. The phone then powers the e-paper display and refreshes its images via the NFC antenna.

[0004] Existing phone cases have the following drawbacks: low antenna power transmission efficiency, making it prone to failure when scanning images; strict control of the installation position is required when installing the antenna structure, as deviations in the installation angle or position can lead to severe coupling attenuation, increasing the difficulty of installation. Utility Model Content

[0005] This invention provides a mobile phone protective case that improves antenna power transmission efficiency, avoids image refresh failures, enhances communication stability, and reduces installation difficulty.

[0006] According to one aspect of this utility model, a mobile phone protective case is provided, comprising:

[0007] An insulating housing and a loop antenna and an electronic paper display module disposed on the insulating housing; the loop antenna is electrically connected to the electronic paper display module;

[0008] The insulating housing includes a first through hole for accommodating the camera of the mobile phone; the loop antenna is arranged around the first through hole.

[0009] Optionally, the insulating housing further includes an annular groove surrounding the first through hole, and the annular antenna is disposed within the annular groove;

[0010] The insulating housing also includes a receiving groove, in which the electronic paper display module is disposed.

[0011] Optionally, the insulating housing includes a bottom and sidewalls connected to each other, the sidewalls surrounding the bottom; the bottom includes an inner surface and an outer surface disposed opposite to each other, the inner surface being the side of the bottom closest to the mobile phone; the receiving groove is disposed on the outer surface of the bottom;

[0012] The annular groove is disposed on the inner surface of the bottom, and the bottom includes a second through hole through which the annular antenna is electrically connected to the electronic paper display module; or, the annular groove is disposed on the outer surface of the bottom.

[0013] Optionally, the equivalent inductance of the loop antenna is 0.2uH-2uH.

[0014] Optionally, the loop antenna can be a circular ring, an elliptical ring, a polygon, or a rounded polygon.

[0015] Optionally, the loop antenna includes at least two turns of coil.

[0016] Optionally, the coil thickness of the loop antenna is 0.1-0.3mm, the line width of the coil is 0.3-1mm, and the thickness of the wire inside the coil is 0.3oz-2oz; the overall length of the loop antenna is 10-200mm, the overall width of the loop antenna is 5-70mm, and the total width of the coil is 0.4-4mm.

[0017] Optionally, the distance between the loop antenna and the edge of the first through hole is the same constant value; or, the distance between at least a portion of the loop antenna and the edge of the first through hole is different from the distance between other portions of the loop antenna and the edge of the first through hole.

[0018] Optional, the phone case also includes:

[0019] First adhesive backing, second adhesive backing, first protective cover, and second protective cover;

[0020] The first adhesive backing is disposed between the loop antenna and the insulating housing, and the first protective cover is disposed on the side of the loop antenna away from the insulating housing, covering the loop antenna;

[0021] The second adhesive backing is disposed between the electronic paper display module and the insulating housing, and the second protective cover is disposed on the side of the electronic paper display module away from the insulating housing, covering the electronic paper display module.

[0022] Optionally, the electronic paper display module includes a circuit board and an electronic paper display screen, wherein the circuit board is electrically connected to the electronic paper display screen;

[0023] The loop antenna includes gold fingers, which are electrically connected to the circuit board. The length of the gold fingers can be 5-100mm.

[0024] In this embodiment, the loop antenna is arranged around the first through-hole, resulting in a larger circumference and coverage area of ​​the loop antenna, a larger overlap area with the phone's NFC antenna, increased magnetic flux capture area, and a higher coupling coefficient. This significantly improves power transmission efficiency and enhances image processing stability. Furthermore, the loop antenna has a more uniform magnetic field, better magnetic field symmetry during coupling, lower losses, and a wider bandwidth, improving communication stability and reducing the antenna's sensitivity to position and angle during installation. It is also less susceptible to significant resonant point drift caused by metal or magnetism, reducing debugging difficulty. The loop layout avoids the area with the highest concentration of metal in the center of the phone's camera module, minimizing metal interference and eliminating the need to consider position and angle offsets during installation, further reducing installation difficulty. Moreover, the loop antenna's arrangement around the first through-hole does not occupy excessive space and does not interfere with the electronic paper display module's setup. Therefore, this phone case can improve antenna power transmission efficiency, prevent image processing failures, enhance communication stability, and reduce installation difficulty.

[0025] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an exploded view of a mobile phone protective case provided in an embodiment of this utility model.

[0028] Figure 2 This is an exploded view from another perspective of the mobile phone protective case provided in this embodiment of the utility model.

[0029] Figure 3 This is a front view of the insulating shell provided in this embodiment of the utility model.

[0030] Figure 4 This is a schematic diagram of the back of the insulating shell provided in this embodiment of the utility model.

[0031] Figure 5 This is a schematic diagram of a loop antenna provided in an embodiment of the present invention. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model 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 the embodiments of the utility model described herein can be implemented 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 steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] This utility model embodiment provides a mobile phone protective case. Figure 1 This is an exploded view of a mobile phone protective case provided in an embodiment of this utility model. Figure 2 This is an exploded view from another perspective of the mobile phone protective case provided in this embodiment of the utility model. (Reference) Figure 1 and Figure 2 The phone case includes:

[0035] An insulating housing 10 and a loop antenna 20 and an electronic paper display module 30 disposed on the insulating housing 10; the loop antenna 20 is electrically connected to the electronic paper display module 30;

[0036] The insulating housing 10 includes a first through hole 11 for accommodating the camera of the mobile phone; a loop antenna 20 is arranged around the first through hole 11.

[0037] Specifically, the insulating shell 10 can be made of plastic materials such as PC, ABS, PP, and TPU, or silicone, or a mixture of plastic and silicone. The insulating shell 10 covers the bottom and sides of the phone, protecting it. The back of the phone typically includes a camera; the first through-hole 11 accommodates the camera, preventing the insulating shell 10 from obstructing it. The loop antenna 20 communicates with the NFC antenna inside the phone, enabling the phone to power the electronic paper display module 30 and control the electronic paper display module 30 to refresh its screen.

[0038] Existing phone cases typically have their antennas located on the back, near the top edge and close to the camera module. This has the following drawbacks: the overlap area between the phone case antenna and the magnetic field of the phone's NFC coil is small, and the coupling coefficient is low, resulting in low power transmission efficiency and easy failures when scanning images; the phone case antenna is small in size, has low equivalent inductance, and narrow bandwidth, and the resonant point drifts significantly when near metal or magnetic materials, making debugging difficult. During structural installation, the installation position and angle must be strictly controlled, or any deviation in position will lead to severe coupling attenuation with the phone antenna.

[0039] The NFC antenna in a mobile phone is usually located near the camera module. In this embodiment, the loop antenna 20 is arranged around the first through-hole 11, resulting in a larger perimeter and coverage area. This increases the overlap area with the phone's NFC antenna, increases the magnetic flux capture area, and improves the coupling coefficient, significantly improving power transmission efficiency and image processing stability. Furthermore, the loop antenna 20 has a more uniform magnetic field, better magnetic field symmetry during coupling, lower losses, and a wider bandwidth, enhancing communication stability and reducing the antenna's sensitivity to position and angle during installation. It is less susceptible to significant resonant point drift due to metal or magnetic interference, reducing debugging difficulty. The loop layout also avoids the area with the highest concentration of metal in the center of the camera module, minimizing metal interference. Installation does not require consideration of position and angle offsets, further reducing installation difficulty. Moreover, its arrangement around the first through-hole 11 does not occupy much space and does not affect the electronic paper display module. Therefore, this mobile phone protective case can improve antenna power transmission efficiency, prevent image processing failures, enhance communication stability, and reduce installation difficulty.

[0040] Figure 3 This is a front view of the insulating shell provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the back of the insulating shell provided in an embodiment of this utility model. Optionally, based on the above embodiment, refer to... Figures 1-4 The insulating housing 10 also includes an annular groove 12 surrounding the first through hole 11, and the ring antenna 20 is disposed in the annular groove 12;

[0041] The insulating housing 10 also includes a receiving groove 14, in which the electronic paper display module 30 is disposed.

[0042] Specifically, by setting the annular groove 12, the installation of the annular antenna 20 is made more stable, the installation and positioning of the annular antenna 30 is more accurate, and the surface of the insulating housing 10 is made flat after the annular antenna 20 is installed. By setting the receiving groove 14, the installation of the electronic paper display module 30 is made more stable, and the surface of the insulating housing 10 is made flat after the electronic paper display module 30 is installed.

[0043] Based on the above embodiments, optionally, the insulating housing 10 includes a bottom 110 and a side wall 120 connected to each other, with the side wall 120 surrounding the bottom 110; the bottom 110 includes an inner surface 111 and an outer surface 112 disposed opposite to each other, with the inner surface 111 being the side of the bottom 110 closest to the mobile phone; and a receiving groove 14 is disposed on the outer surface 112 of the bottom 110.

[0044] The annular groove 12 is disposed on the inner surface 111 of the bottom 110, and the bottom 110 includes a second through hole 13, through which the annular antenna 20 is electrically connected to the electronic paper display module 30; or, the annular groove 12 is disposed on the outer surface 112 of the bottom 110.

[0045] Specifically, the bottom 110 and sidewall 120 of the insulating housing 10 form a groove, in which the mobile phone is placed. The bottom 110 of the insulating housing 10 contacts the bottom of the mobile phone, and the sidewall 120 of the insulating housing 10 contacts the sidewall of the mobile phone. A first through hole 11 is provided on the bottom 110. The inner surface 111 of the bottom 110 of the insulating housing 10 contacts the bottom of the mobile phone. The electronic paper display module 30 is provided on the outer surface 112 of the bottom 110 of the insulating housing 10, thereby providing a clearer display. The loop antenna 20 can be provided on the inner surface 111, in which case the connecting part of the loop antenna 20 can pass through the second through hole 13 and connect to the electronic paper display module 30. Alternatively, the loop antenna 20 can be provided on the outer surface 112, in which case the loop antenna 20 can be directly electrically connected to the electronic paper display module 30 without the need for the second through hole 13.

[0046] By setting the loop antenna 20 and the electronic paper display module 30 on the inner surface 111 and outer surface 112 of the bottom 110 of the insulating housing 10 respectively, the size and shape of the loop antenna 20 can be adjusted as needed without affecting the electronic paper display module 30, thereby further improving the antenna power transmission efficiency, avoiding image printing failure, improving communication stability, and reducing installation difficulty.

[0047] By placing both the loop antenna 20 and the electronic paper display module 30 on the outer surface 112 of the bottom 110 of the insulating housing 10, the assembly difficulty of the loop antenna 20 and the electronic paper display module 30 can be reduced.

[0048] Based on the above embodiments, optionally, the equivalent inductance of the loop antenna 20 is 0.2uH-2uH.

[0049] Specifically, the equivalent inductance of the loop antenna 20 affects the coupling transmission effect between the loop antenna 20 and the mobile phone antenna. If the equivalent inductance is too small or too large, it is easy to cause coupling transmission failure. In this embodiment, by setting the equivalent inductance of the loop antenna 20 to 0.2uH-2uH, the coupling transmission effect between the loop antenna 20 and the mobile phone antenna can be improved, the antenna power transmission efficiency can be increased, the image refresh failure can be avoided, the communication stability can be improved, and the installation difficulty can be reduced.

[0050] For example, the equivalent inductance of the loop antenna 20 can be greater than or equal to 0.4uH, such as 0.5uH, 1.0uH, 1.5uH, or 1.8uH. A matching capacitor can be set for the loop antenna 20 based on its equivalent inductance to match the operating frequency of the loop antenna 20 with that of the mobile phone antenna. For example, when the equivalent inductance is 1.8uH, the matching capacitor for the loop antenna 20 can be set to 33pF.

[0051] Based on the above embodiments, the loop antenna 20 may optionally be a circular ring, an elliptical ring, a polygon, or a rounded polygon.

[0052] Specifically, the shape of the loop antenna 20 can be the same as or different from the shape of the edge of the first through-hole 11. The shape and size of the loop antenna 20 can be changed according to the position of the mobile phone antenna, so that the loop antenna and the mobile phone antenna have a large magnetic field overlap area and coupling coefficient.

[0053] Based on the above embodiments, optionally, the loop antenna 20 includes at least two turns of coil.

[0054] Specifically, the number of coil turns of the loop antenna 20 can be adjusted according to the bandwidth, equivalent inductance, and coupling requirements with the mobile phone antenna. By setting the loop antenna 20 to include at least two coil turns, a larger coverage area is ensured, the overlap area with the mobile phone's own antenna coil is larger, the magnetic flux capture area is increased, and the coupling coefficient is higher, which can significantly improve power transmission efficiency and enhance the stability of image processing.

[0055] Figure 5 This is a schematic diagram of a loop antenna provided in an embodiment of the present invention. Optionally, based on the above embodiment, refer to... Figure 5 The thickness D of the coil of the loop antenna 20 is 0.1-0.3mm, the line width of the coil of the loop antenna is 0.3-1mm, and the thickness of the wire inside the coil of the loop antenna 20 is 0.3oz-2oz.

[0056] Specifically, the loop antenna 20 may include three turns of coil. Each coil is formed by a conductive metal material, such as copper, with a thickness of 0.3 oz to 2 oz or 0.5 oz to 1.5 oz; an exemplary copper thickness of 1 oz is possible. The surface of the coil may include an insulating layer. The linewidth of each coil may be 0.3 to 1 mm or 0.3 to 0.6 mm, for example, 0.5 mm.

[0057] Figure 5 The diagram shows a front view (right) and a side view (left) of the loop antenna 20, for reference. Figure 5 For example, the overall length L1 of the loop antenna 20 is 10-200mm, or 70-80mm, for example, 77.1mm. The overall width W of the loop antenna 20 is 5-70mm, or 40-55mm, for example, 47.3mm. The length L2 of the gold fingers 21 of the loop antenna 20 can be 5-100mm, or 7-12mm, for example, 9.7mm. The total width S of the coil of the loop antenna 20 can be 0.4-4mm, or 0.6-2.5mm, for example, 2mm.

[0058] Based on the above embodiments, optionally, refer to the following: Figures 1-4 The distance between the loop antenna 20 and the edge of the first through hole 11 is the same constant value; or, the distance between at least a portion of the loop antenna 20 and the edge of the first through hole 11 is different from the distance between other portions of the loop antenna 20 and the edge of the first through hole 11.

[0059] The loop antenna 20 can be parallel to and equidistant from the edge of the first through-hole 11, or it can be unequally spaced from the edge of the first through-hole 11. For example, the loop antenna 20 is a rounded quadrilateral, and the distance between at least one of the four sides of the rounded quadrilateral and the edge of the first through-hole 11 is different from the distance between the other sides and the edge of the first through-hole 11. Specifically, the distance between the loop antenna 20 and the first through-hole 10 can be set according to the position of the mobile phone antenna, etc.

[0060] Optional, continue to refer to Figure 1 and Figure 2 The phone case also includes: a first adhesive backing 40, a second adhesive backing 50, a first protective cover 60, and a second protective cover 70;

[0061] The first adhesive 40 is disposed between the loop antenna 20 and the insulating housing 10, and the first protective cover 60 is disposed on the side of the loop antenna 20 away from the insulating housing 10, and the first protective cover 60 covers the loop antenna 20.

[0062] The second adhesive 50 is disposed between the electronic paper display module 30 and the insulating housing 10, and the second protective cover 70 is disposed on the side of the electronic paper display module 30 away from the insulating housing 10, and the second protective cover 70 covers the electronic paper display module 30.

[0063] Specifically, the first adhesive 40 is used to fix the loop antenna 20, and the first protective cover 60 is used to fix and protect the loop antenna 20, and also to maintain the aesthetics of the insulating housing 10. The second adhesive 50 is used to fix the electronic paper display module 30, and the second protective cover 70 is used to fix and protect the electronic paper display module, and also to maintain the aesthetics of the insulating housing 10. The first protective cover 60 and the second protective cover 70 can be made of the same material as the insulating housing 10. The first protective cover 60 and the second protective cover 70 can be glued to the insulating housing 10.

[0064] The thickness of the first adhesive 40 and the second adhesive 50 can be 0.03mm-0.1mm, and for example, it can be 0.05mm. The first protective cover 60 can cover the loop antenna 20 and other areas of the front of the bottom of the insulating housing 10, making the front of the insulating housing 10 flatter.

[0065] Based on the above embodiments, optionally, the electronic paper display module 30 includes a circuit board 31 and an electronic paper display screen 32, with the circuit board 31 and the electronic paper display screen 32 being electrically connected.

[0066] The loop antenna 20 includes a gold finger 21, which is electrically connected to the circuit board 31.

[0067] When the loop antenna 20 is disposed on the inner surface of the bottom of the insulating housing 10, the gold finger 21 passes through the second through hole 13 and is electrically connected to the circuit board 31.

[0068] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0069] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A mobile phone protective case, characterized in that, include: An insulating housing and a loop antenna and an electronic paper display module disposed on the insulating housing; The loop antenna is electrically connected to the electronic paper display module; The insulating housing includes a first through hole for accommodating the camera of the mobile phone; the loop antenna is arranged around the first through hole.

2. The mobile phone protective case according to claim 1, characterized in that: The insulating housing further includes an annular groove surrounding the first through hole, and the annular antenna is disposed within the annular groove; The insulating housing also includes a receiving groove, in which the electronic paper display module is disposed.

3. The mobile phone protective case according to claim 2, characterized in that: The insulating housing includes a bottom and sidewalls connected to each other, the sidewalls surrounding the bottom; the bottom includes an inner surface and an outer surface disposed opposite to each other, the inner surface being the side of the bottom closest to the mobile phone; the receiving groove is disposed on the outer surface of the bottom; The annular groove is disposed on the inner surface of the bottom, and the bottom includes a second through hole, through which the annular antenna is electrically connected to the electronic paper display module; Alternatively, the annular groove may be disposed on the outer surface of the bottom.

4. The mobile phone protective case according to claim 1, characterized in that: The equivalent inductance of the loop antenna is 0.2uH-2uH.

5. The mobile phone protective case according to claim 1, characterized in that: The loop antenna can be a circular ring, an elliptical ring, a polygon, or a rounded polygon.

6. The mobile phone protective case according to claim 1, characterized in that: The loop antenna includes at least two turns of coil.

7. The mobile phone protective case according to claim 6, characterized in that: The coil thickness of the loop antenna is 0.1-0.3 mm, the line width of the coil of the loop antenna is 0.3-1 mm, and the thickness of the wire inside the coil of the loop antenna is 0.3 oz-2 oz. The overall length of the loop antenna is 10-200mm, the overall width of the loop antenna is 5-70mm, and the total width of the coil of the loop antenna is 0.4-4mm.

8. The mobile phone protective case according to claim 1, characterized in that: The distance between the loop antenna and the edge of the first through hole is the same constant value; or, the distance between at least a portion of the loop antenna and the edge of the first through hole is different from the distance between other portions of the loop antenna and the edge of the first through hole.

9. The mobile phone protective case according to claim 1, characterized in that, Also includes: First adhesive backing, second adhesive backing, first protective cover, and second protective cover; The first adhesive backing is disposed between the loop antenna and the insulating housing, and the first protective cover is disposed on the side of the loop antenna away from the insulating housing, covering the loop antenna; The second adhesive backing is disposed between the electronic paper display module and the insulating housing, and the second protective cover is disposed on the side of the electronic paper display module away from the insulating housing, covering the electronic paper display module.

10. The mobile phone protective case according to claim 1, characterized in that: The electronic paper display module includes a circuit board and an electronic paper display screen, wherein the circuit board is electrically connected to the electronic paper display screen. The loop antenna includes gold fingers, which are electrically connected to the circuit board. The length of the gold fingers is 5-100mm.

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