Wireless charging module and electronic equipment

Abstract

The embodiment of the utility model provides a wireless charging module and electronic equipment. The wireless charging module comprises a coil, a magnetic conductive ring and a protective film. The connection surface of the annular body formed by winding the coil is fixed on the first surface of the magnetic conductive ring, the magnetic conductive ring can improve the inductance value of the coil, the magnetic field coupling degree is improved, and the wireless charging efficiency is improved. The protective film is arranged on the second surface of the magnetic conductive ring, so that the risk that the magnetic conductive ring is broken when impacted is reduced. Even if the magnetic conductive ring is broken by large impact force, the fragments of the magnetic conductive ring are still fixed into a whole through the protective film, the original shape is basically maintained, the magnetic conductive function does not lose efficacy, and the reliability is high. According to the wireless charging module, the thickness size of the first annular part can be reduced under a certain thickness size, so that the number of turns of a coil can be increased, and the wireless charging efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of wireless charging structure technology, and in particular to a wireless charging module and electronic device. Background Technology

[0002] The principle of electromagnetic induction wireless charging is similar to that of a transformer. A changing magnetic field is generated by a primary coil, and a current is generated by the secondary coil after sensing the change in the magnetic field, thus realizing the transfer of electrical energy. Related wireless charging modules include a coil and a magnetic ring. The coil is placed on the magnetic ring, which improves wireless charging efficiency. How to provide a wireless charging module and electronic device in which the magnetic ring retains its magnetic conductivity under impact and has high reliability is a challenge that the industry needs to address. Utility Model Content

[0003] This application provides a wireless charging module and an electronic device. The magnetic ring in the wireless charging module does not lose its magnetic conductivity when subjected to impact, and has high reliability.

[0004] The embodiments of this application adopt the following technical solutions:

[0005] In a first aspect, embodiments of this application provide a wireless charging module, including: a coil, a magnetic ring, and a protective film. The magnetic ring includes a first annular portion, the first annular portion having a first surface and a second surface distributed opposite to each other along the thickness direction of the magnetic ring. The coil is a ring-shaped body made of wound wire, the ring-shaped body having a connecting surface on one side in the thickness direction of the ring-shaped body, the connecting surface being fixed to the first surface of the first annular portion. The protective film is fixed to the second surface of the first annular portion.

[0006] The wireless charging module provided in this application embodiment fixes the connecting surface of the coil-wound annular body to the first surface of the magnetic ring. The magnetic ring can increase the inductance of the coil, improve the magnetic field coupling, and enhance wireless charging efficiency. A protective film is provided on the second surface of the magnetic ring to reduce the risk of breakage when subjected to impact. Even if the magnetic ring breaks under a large impact, the fragments are still fixed together by the protective film, basically maintaining their original shape, and the magnetic conduction function remains intact, resulting in high reliability. Within a certain thickness dimension, the thickness of the first annular portion of the wireless charging module can be reduced; for example, the thickness at the thinnest point of the first annular portion can be reduced to 0.4 mm to 0.6 mm, thereby increasing the number of coil turns and improving wireless charging efficiency.

[0007] In one alternative implementation, the magnetic ring can be made of magnetic materials such as ferrite to enhance magnetic field coupling and improve ineffective charging efficiency.

[0008] In one alternative implementation, the magnetic ring can be a complete ring structure or a ring structure with an opening.

[0009] In one alternative implementation, the protective film can be made of polyurethane, polyethylene terephthalate, or the like.

[0010] In one alternative implementation, the magnetic ring includes a first annular portion and a second annular portion connected to the inner edge of the first annular portion. The height of the second annular portion is greater than the thickness of the first annular portion, and the coil is sleeved around the second annular portion. This can further increase the inductance of the coil, improve the magnetic field coupling, and enhance the wireless charging efficiency.

[0011] In one alternative implementation, the magnetic ring is configured as a first annular portion, without a second annular portion.

[0012] In one alternative implementation, the magnetic ring includes a first annular portion and a third annular portion connected to the outer edge of the first annular portion. The height of the third annular portion is greater than the thickness of the first annular portion, and the coil is located inside the third annular portion. This can further increase the inductance of the coil, improve the magnetic field coupling, and enhance the wireless charging efficiency.

[0013] In one alternative implementation, the magnetic ring includes a first annular portion, a second annular portion, and a third annular portion. The second annular portion is connected to the inner edge of the first annular portion, and its height is greater than the thickness of the first annular portion. The third annular portion is connected to the outer edge of the first annular portion, and its height is greater than the thickness of the first annular portion. The second and third annular portions are spaced apart, and the coil is located between the second and third annular portions. This can further increase the inductance of the coil, improve the magnetic field coupling, and enhance the wireless charging efficiency.

[0014] In one alternative implementation, the thinnest part of the first annular portion has a thickness ranging from [0.40 mm to 0.60 mm]. Within a given thickness, the wireless charging module can reduce the thickness of the first annular portion, thereby increasing the number of coil turns and improving wireless charging efficiency.

[0015] In one alternative implementation, the first surface of the first annular portion is perpendicular to the axis of the magnetic ring. When the wireless charging module is applied to an electronic device, the second surface of the first annular portion can face the motherboard of the electronic device, thus reducing the space occupied by the magnetic ring.

[0016] In one alternative implementation, in the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually approaches or moves away from the first plane, the first plane being perpendicular to the axis of the magnetic ring, and the second surface of the first annular portion being at least partially located on the first plane. The thicker sections of the first annular portion have greater structural strength, which improves the overall structural strength and makes the first annular portion less prone to breakage from impact.

[0017] In one alternative implementation, the thinnest part of the first annular portion is located near its outer edge. In the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually approaches the first plane, and the thickness of the first annular portion gradually decreases.

[0018] In one alternative implementation, the thinnest part of the first annular portion is located near its inner edge. In the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually moves away from the first plane, and the thickness of the first annular portion gradually increases.

[0019] In one alternative implementation, the thinnest part of the first annular portion is located at the midpoint between its outer and inner edges. In the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually approaches and then gradually moves away from the first plane, and the thickness of the first annular portion gradually decreases and then gradually increases.

[0020] In one alternative implementation, in the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually approaches or gradually moves away from the first plane. The shape of the connecting surface of the annular body is set according to the shape of the first surface of the first annular portion, so that the connecting surface of the annular body can be tightly attached to the first surface of the first annular portion without excessive gaps between them. The number of coil turns can be increased to improve wireless charging efficiency.

[0021] In one alternative implementation, the first surface of the first annular portion includes at least one of an inclined surface and an arcuate surface.

[0022] In one alternative implementation, the thinnest part of the first annular portion is located near its outer edge. The thickness of the first annular portion gradually decreases from its inner edge to its outer edge. The first surface of the first annular portion is an inclined surface. The connecting surface of the annular body is also an inclined surface, and the connecting surface is fixed to the first surface.

[0023] In one alternative implementation, the thinnest part of the first annular portion is located near its inner edge. In the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually moves away from the first plane, and the thickness of the first annular portion gradually increases. The first surface of the first annular portion is an inclined surface. The connecting surface of the annular body is also an inclined surface, and the connecting surface is fixed to the first surface.

[0024] In one alternative implementation, the thinnest part of the first annular portion is located near its outer edge. The thickness of the first annular portion gradually decreases from its inner edge to its outer edge. The first surface of the first annular portion is a concave arc surface. The connecting surface of the annular body is a convex arc surface, and the connecting surface is fixed to the first surface.

[0025] In one alternative implementation, the thinnest part of the first annular portion is located at the midpoint between its outer and inner edges. In the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually approaches and then gradually moves away from the first plane, and the thickness of the first annular portion gradually decreases and then gradually increases. The first surface includes an inclined surface and a concave arc surface; the inclined surface is positioned close to the axis of the magnetic ring, and the concave arc surface is positioned away from the axis of the magnetic ring. The connecting surface of the annular body includes an inclined surface and a convex arc surface; the inclined surface in the connecting surface is fixed to the inclined surface in the first surface, and the convex arc surface in the connecting surface is fixed to the concave arc surface in the first surface.

[0026] In one alternative implementation, at least a portion of the first surface of the first annular portion is an inclined surface, and the inclination angle of the inclined surface relative to the first plane ranges from [5° to 50°]. The thicker sections of the first annular portion have greater structural strength, which improves the overall structural strength and makes the first annular portion less prone to impact breakage. When a coil is disposed on the second surface of the first annular portion, the coil has less impact on the length and width of the wireless charging module, resulting in a more compact wireless charging module structure.

[0027] In one alternative implementation, the second surface of the first annular portion is perpendicular to the axis of the magnetic ring. The second surface of the first annular portion is set as a plane to facilitate the assembly of the sheet-like protective film onto the second surface of the first annular portion.

[0028] In one alternative implementation, the protective film is annular. The annular protective film is fixed to the second surface of the first annular portion. This facilitates the arrangement of predetermined structures, such as detection modules or other devices, inside the first annular portion, thereby improving space utilization.

[0029] In one alternative implementation, the first surface of the first annular portion and the protective film are bonded together with an adhesive.

[0030] In one alternative implementation, the first annular portion has an opening through which the end of the coil passes. The coil is mounted on a first surface of the first annular portion, and the end of the coil can pass through the opening onto a second surface and then be led out to a predetermined location, such as a motherboard or a battery.

[0031] In one alternative implementation, the wireless charging module further includes a magnet located inside a magnetic ring. A coil is wound around the magnet. The magnet is used for magnetic engagement with the wireless charger / device to achieve positioning and engagement between the wireless charger and the device to be charged.

[0032] Secondly, embodiments of this application provide a wireless charging module, including a coil and a magnetic ring. The magnetic ring includes a first annular portion, which has a first surface and a second surface distributed opposite to each other along the thickness direction of the magnetic ring. The coil is a ring-shaped body made of wound wire, and the ring-shaped body has a connecting surface on one side in the thickness direction of the ring-shaped body, the connecting surface being fixed to the first surface of the first annular portion. In the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually approaches or gradually moves away from a first plane, the first plane being perpendicular to the axis of the magnetic ring, and the second surface of the first annular portion being at least partially located on the first plane.

[0033] The wireless charging module provided in this application embodiment fixes the connecting surface of the coil-wound annular body to the first surface of the magnetic ring. The magnetic ring can increase the inductance of the coil, improve the magnetic field coupling, and enhance the wireless charging efficiency. Using the first plane passing through the second surface as a reference plane, the height of the first surface of the first annular portion gradually changes from the inner edge to the outer edge, which can be understood as the thickness of the first annular portion gradually changing. The thicker parts of the first annular portion have greater structural strength, improving the overall structural strength and making the first annular portion less prone to impact breakage, resulting in higher reliability. Within a certain thickness dimension, the thickness of the first annular portion can be reduced; for example, the thinnest part of the first annular portion can be reduced to 0.4 mm to 0.6 mm, thereby increasing the number of coil turns and improving wireless charging efficiency.

[0034] In one alternative implementation, the wireless charging module further includes a protective film fixed to the second surface of the first annular portion. The protective film on the second surface of the magnetic ring reduces the risk of breakage upon impact. Even if the magnetic ring breaks under a large impact, the fragments remain held together by the protective film, essentially maintaining their original shape, ensuring the magnetic conduction function remains intact and providing high reliability.

[0035] In one alternative implementation, the magnetic ring can be made of magnetic materials such as ferrite to enhance magnetic field coupling and improve ineffective charging efficiency.

[0036] In one alternative implementation, the magnetic ring can be a complete ring structure or a ring structure with an opening.

[0037] In one alternative implementation, the protective film can be made of polyurethane, polyethylene terephthalate, or the like.

[0038] In one alternative implementation, the magnetic ring includes a first annular portion and a second annular portion connected to the inner edge of the first annular portion. The height of the second annular portion is greater than the thickness of the first annular portion, and the coil is sleeved around the second annular portion. This can further increase the inductance of the coil, improve the magnetic field coupling, and enhance the wireless charging efficiency.

[0039] In one alternative implementation, the magnetic ring is configured as a first annular portion, without a second annular portion.

[0040] In one alternative implementation, the magnetic ring includes a first annular portion and a third annular portion connected to the outer edge of the first annular portion. The height of the third annular portion is greater than the thickness of the first annular portion, and the coil is located inside the third annular portion. This can further increase the inductance of the coil, improve the magnetic field coupling, and enhance the wireless charging efficiency.

[0041] In one alternative implementation, the magnetic ring includes a first annular portion, a second annular portion, and a third annular portion. The second annular portion is connected to the inner edge of the first annular portion, and its height is greater than the thickness of the first annular portion. The third annular portion is connected to the outer edge of the first annular portion, and its height is greater than the thickness of the first annular portion. The second and third annular portions are spaced apart, and the coil is located between the second and third annular portions. This can further increase the inductance of the coil, improve the magnetic field coupling, and enhance the wireless charging efficiency.

[0042] In one alternative implementation, the thinnest part of the first annular portion has a thickness ranging from [0.40 mm to 0.60 mm]. Within a given thickness, the wireless charging module can reduce the thickness of the first annular portion, thereby increasing the number of coil turns and improving wireless charging efficiency.

[0043] In one alternative implementation, the first surface of the first annular portion is perpendicular to the axis of the magnetic ring. When the wireless charging module is applied to an electronic device, the second surface of the first annular portion can face the motherboard of the electronic device, thus reducing the space occupied by the magnetic ring.

[0044] In one alternative implementation, the thinnest part of the first annular portion is located near its outer edge. In the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually approaches the first plane, and the thickness of the first annular portion gradually decreases.

[0045] In one alternative implementation, the thinnest part of the first annular portion is located near its inner edge. In the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually moves away from the first plane, and the thickness of the first annular portion gradually increases.

[0046] In one alternative implementation, the thinnest part of the first annular portion is located at the midpoint between its outer and inner edges. In the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually approaches and then gradually moves away from the first plane, and the thickness of the first annular portion gradually decreases and then gradually increases.

[0047] In one alternative implementation, in the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually approaches or gradually moves away from the first plane. The shape of the connecting surface of the annular body is set according to the shape of the first surface of the first annular portion, so that the connecting surface of the annular body can be tightly attached to the first surface of the first annular portion without excessive gaps between them. The number of coil turns can be increased to improve wireless charging efficiency.

[0048] In one alternative implementation, the first surface of the first annular portion includes at least one of an inclined surface and an arcuate surface.

[0049] In one alternative implementation, the thinnest part of the first annular portion is located near its outer edge. The thickness of the first annular portion gradually decreases from its inner edge to its outer edge. The first surface of the first annular portion is an inclined surface. The connecting surface of the annular body is also an inclined surface, and the connecting surface is fixed to the first surface.

[0050] In one alternative implementation, the thinnest part of the first annular portion is located near its inner edge. In the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually moves away from the first plane, and the thickness of the first annular portion gradually increases. The first surface of the first annular portion is an inclined surface. The connecting surface of the annular body is also an inclined surface, and the connecting surface is fixed to the first surface.

[0051] In one alternative implementation, the thinnest part of the first annular portion is located near its outer edge. The thickness of the first annular portion gradually decreases from its inner edge to its outer edge. The first surface of the first annular portion is a concave arc surface. The connecting surface of the annular body is a convex arc surface, and the connecting surface is fixed to the first surface.

[0052] In one alternative implementation, the thinnest part of the first annular portion is located at the midpoint between its outer and inner edges. In the direction from the inner edge to the outer edge of the first annular portion, the first surface of the first annular portion gradually approaches and then gradually moves away from the first plane, and the thickness of the first annular portion gradually decreases and then gradually increases. The first surface includes an inclined surface and a concave arc surface; the inclined surface is positioned close to the axis of the magnetic ring, and the concave arc surface is positioned away from the axis of the magnetic ring. The connecting surface of the annular body includes an inclined surface and a convex arc surface; the inclined surface in the connecting surface is fixed to the inclined surface in the first surface, and the convex arc surface in the connecting surface is fixed to the concave arc surface in the first surface.

[0053] In one alternative implementation, the first surface of the first annular portion is at least partially inclined, and the inclination angle of the inclined surface relative to the first plane ranges from [5° to 50°]. The thicker sections of the first annular portion have greater structural strength, which improves the overall structural strength and makes the first annular portion less prone to impact breakage. When a coil is disposed on the second surface of the first annular portion, the coil has less impact on the length and width of the wireless charging module (i.e., the vertical dimension of the magnetic ring axis), resulting in a more compact wireless charging module structure.

[0054] In one alternative implementation, the second surface of the first annular portion is perpendicular to the axis of the magnetic ring. The second surface of the first annular portion is set as a plane to facilitate the assembly of the sheet-like protective film onto the second surface of the first annular portion.

[0055] In one alternative implementation, the protective film is annular. The annular protective film is fixed to the second surface of the first annular portion. This facilitates the arrangement of predetermined structures, such as detection modules or other devices, inside the first annular portion, thereby improving space utilization.

[0056] In one alternative implementation, the first surface of the first annular portion and the protective film are bonded together with an adhesive.

[0057] In one alternative implementation, the first annular portion has an opening through which the end of the coil passes. The coil is mounted on a first surface of the first annular portion, and the end of the coil can pass through the opening onto a second surface and then be led out to a predetermined location, such as a motherboard or a battery.

[0058] In one alternative implementation, the wireless charging module further includes a magnet located inside a magnetic ring. A coil is wound around the magnet. The magnet is used for magnetic engagement with the wireless charger / device to achieve positioning and engagement between the wireless charger and the device to be charged.

[0059] Thirdly, embodiments of this application provide an electronic device, including a first housing and the aforementioned wireless charging module. The wireless charging module includes a coil and a magnetic ring, with the coil disposed on the magnetic ring. The wireless charging module is located inside the first housing, with the coil facing the first housing.

[0060] The electronic device provided in this application embodiment has a wireless charging module located inside a first housing, which protects the wireless charging module. The magnetic ring in the wireless charging module increases the inductance of the coil, and with the coil facing the first housing, it enhances the magnetic field coupling of the coil, thereby improving wireless charging efficiency.

[0061] In one alternative implementation, the electronic device is a watch or a wristband. The electronic device includes a first housing and a second housing, the first housing being a bottom housing and the second housing being a mid-frame. The bottom housing is mounted on the mid-frame, which can be connected to a watch strap or wristband for easy wear. The motherboard and battery are electrically connected. The battery may be located on the side of the motherboard opposite the bottom housing.

[0062] The wireless charging module can be located inside the bottom case and is electrically connected to the battery. When charging the battery is needed, place the watch or bracelet on the wireless charger with the bottom case facing the wireless charger. The wireless charging module of the watch or bracelet and the wireless charger are electromagnetically coupled to achieve charging.

[0063] In one alternative implementation, the electronic device is a wireless charger. The electronic device includes a first shell and a second shell, the first shell being a front shell and the second shell being a bottom shell. The front shell is mounted on the bottom shell. When charging is required, the device to be charged is placed on the front shell of the wireless charger, and charging is achieved through electromagnetic coupling between the wireless charging module of the wireless charger and the device to be charged.

[0064] In one alternative implementation, the electronic device further includes a detection module located inside the first housing and within the magnetic ring. The detection module includes a substrate and a detection element, with the detection element disposed on the substrate and facing towards the first housing. By locating the detection module inside the magnetic ring, the internal area of ​​the magnetic ring is fully utilized, resulting in a smaller overall structural footprint. The detection module can detect specific user information.

[0065] In one alternative implementation, the detection element includes at least one of an optical volumetric sensor, an electrocardiogram sensor, and a temperature sensor.

[0066] In one alternative implementation, the detection element includes an optical volumetric sensor, which includes a light-emitting diode (LED) and a photodiode. The LED and photodiode are spaced apart, with the light-emitting surface of the LED facing away from the substrate and the light-receiving surface of the photodiode facing away from the substrate. Attached Figure Description

[0067] Figure 1 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application;

[0068] Figure 2 for Figure 1 An assembly diagram of the first shell and the wireless charging module in an electronic device;

[0069] Figure 3 This is a schematic diagram of the structure of the wireless charging module provided in the embodiments of this application applied to an electronic device;

[0070] Figure 4 This is a cross-sectional view of the wireless charging module provided in an embodiment of this application;

[0071] Figure 5 of Figure 4 A schematic diagram of the magnetic ring structure in a wireless charging module;

[0072] Figure 6(a) and (b) are respectively a cross-sectional view of a wireless charging module, an assembly drawing of a magnetic ring and a protective film provided in another embodiment of this application;

[0073] Figure 7 (a) and (b) are respectively a cross-sectional view of a wireless charging module, an assembly drawing of a magnetic ring and a protective film provided in another embodiment of this application;

[0074] Figure 8 (a) and (b) are respectively a cross-sectional view of a wireless charging module, an assembly drawing of a magnetic ring and a protective film provided in another embodiment of this application;

[0075] Figure 9 This is a schematic diagram of the structure of a wireless charging module applied to an electronic device according to another embodiment of this application;

[0076] Figure 10 for Figure 9 A cross-sectional view of a wireless charging module;

[0077] Figure 11 for Figure 9 A schematic diagram of the magnetic ring structure in a wireless charging module;

[0078] Figures 12 to 14 Cross-sectional views of wireless charging modules provided in different embodiments of this application.

[0079] Explanation of reference numerals in the attached figures:

[0080] 100 - Wireless charging module; 10 - Coil; 10a - Ring-shaped body; 11 - Connecting surface; 12 - End of coil; 20 - Magnetic ring; 21 - First annular portion; 21a - First surface; 21b - Second surface; 21c - Inner edge of the first annular portion; 21d - Outer edge of the first annular portion; 211 - Opening; 22 - Second annular portion; 23 - Third annular portion; 30 - Protective film; 40 - Magnet;

[0081] 210 - First case; 220 - Second case; 230 - Watch strap;

[0082] 300 - Detection module; 310 - Substrate; 320 - Detection element; 321 - Light-emitting diode; 322 - Photodiode; 400 - Display screen;

[0083] 1000 - Electronic devices. Detailed Implementation

[0084] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Although the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this implementation. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may arise based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0085] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0086] It should be understood that, in the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., 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.

[0087] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0088] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0089] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0090] This application provides a wireless charging module in which a coil is mounted on a magnetic ring, which can improve wireless charging efficiency. For a given thickness, the wireless charging module can improve efficiency by increasing the number of coil turns, but this reduces the thickness of the magnetic ring, making it more susceptible to breakage under large impacts. To ensure the magnetic ring's manufacturability and stress reliability under conditions such as device manufacturing and drop tests, the magnetic ring needs a certain thickness, such as 0.6 mm or more, which increases the overall structural thickness.

[0091] See Figures 1 to 3 This application provides an electronic device 1000, including a first housing 210 and a wireless charging module 100. The wireless charging module 100 includes a coil 10 and a magnetic ring 20, with the coil 10 disposed on the magnetic ring 20. The wireless charging module 100 is located inside the first housing 210, with the coil 10 facing the first housing 210.

[0092] Among them, the electronic device 1000 can be various devices that require the wireless charging module 100, such as watches, wristbands, mobile phones, tablets, laptops, e-book readers, netbooks, personal digital assistants, or wireless chargers.

[0093] The electronic device 1000 provided in this application embodiment has a wireless charging module 100 located inside a first housing 210, which protects the wireless charging module 100. The magnetic ring 20 in the wireless charging module 100 can increase the inductance of the coil 10. With the coil 10 facing the first housing 210, the magnetic field coupling of the coil 10 is improved, thereby increasing the wireless charging efficiency.

[0094] In some embodiments, see Figures 1 to 3 The electronic device 1000 is a watch or bracelet. The electronic device 1000 includes a first housing 210 and a second housing 220. The first housing 210 is the bottom housing, and the second housing 220 is the middle frame. The bottom housing is mounted on the middle frame, which can be connected to a watch strap 230 or a wristband for easy wear. The bottom housing may have a convex surface. The middle frame may house components such as a motherboard, battery, and display screen 400. The motherboard and battery are electrically connected, and the battery powers the motherboard, display screen 400, and other components. The battery may be located on the side of the motherboard facing away from the bottom housing. The display screen 400 and the bottom housing may be located at opposite ends of the middle frame.

[0095] The wireless charging module 100 can be located inside the bottom shell and is electrically connected to the battery. When charging the battery is needed, the watch or bracelet is placed on the wireless charger with the bottom shell facing the wireless charger. The wireless charging module 100 of the watch or bracelet and the wireless charger are electromagnetically coupled to achieve charging.

[0096] In some embodiments, the electronic device 1000 is a wireless charger. The electronic device 1000 includes a first shell 210 and a second shell 220, where the first shell 210 is the front shell and the second shell 220 is the bottom shell. The front shell is mounted on the bottom shell. When charging is needed, the device to be charged (such as a watch, mobile phone, etc.) is placed on the front shell of the wireless charger, and the wireless charging module 100 of the wireless charger and the device to be charged are electromagnetically coupled to achieve charging.

[0097] See Figures 3 to 5 This application provides a wireless charging module 100, including a coil 10, a magnetic ring 20, and a protective film 30. The magnetic ring 20 includes a first annular portion 21, which has a first surface 21a and a second surface 21b distributed opposite to each other along the thickness direction Z of the magnetic ring 20. The coil 10 is a ring-shaped body 10a made of wire, and the ring-shaped body 10a has a connecting surface 11 on one side in the thickness direction. The connecting surface 11 is fixed to the first surface 21a of the first annular portion 21. The protective film 30 is fixed to the second surface 21b of the first annular portion 21.

[0098] The ring shape of the first annular part 21 can be circular, elliptical, rectangular, rounded rectangle, etc.

[0099] The wireless charging module 100 provided in this application embodiment fixes the connecting surface 11 of the annular body 10a formed by the coil 10 to the first surface 21a of the magnetic ring 20. The magnetic ring 20 can increase the inductance value of the coil 10, improve the magnetic field coupling degree, and improve the wireless charging efficiency. A protective film 30 is provided on the second surface 21b of the magnetic ring 20 to reduce the risk of the magnetic ring 20 breaking when subjected to impact. Even if the magnetic ring 20 breaks under a large impact force, the fragments of the magnetic ring 20 are still fixed together by the protective film 30, basically maintaining the original shape, and the magnetic conduction function does not fail, resulting in high reliability. Under a certain thickness, the thickness of the first annular portion 21 of the wireless charging module 100 can be reduced. For example, the thickness of the thinnest part of the first annular portion 21 can be reduced to 0.4 mm to 0.6 mm, thereby increasing the number of turns of the coil 10 to improve the wireless charging efficiency.

[0100] When it is necessary to confirm the wireless charging module 100 and electronic device 1000 of this embodiment, it can be confirmed by disassembly analysis or computed tomography scan that the coil 10 is a ring body 10a made of wire. The ring body 10a has a connecting surface 11 on one side in the thickness direction. The connecting surface 11 is fixed to the first surface 21a of the first annular portion 21, and the protective film 30 is fixed to the second surface 21b of the first annular portion 21.

[0101] In some embodiments, see Figure 4 and Figure 5 The magnetic ring 20 can be made of magnetic materials such as ferrite to enhance magnetic field coupling and improve ineffective charging efficiency. The magnetic ring 20 can be a continuous ring structure or a ring structure with an opening.

[0102] In some embodiments, see Figure 4 and Figure 5 The material of the protective film 30 can be polyurethane (PU), polyethylene terephthalate (PET), etc.

[0103] In some embodiments, see Figure 4 and Figure 5 The magnetic ring 20 includes a first annular portion 21 and a second annular portion 22. The second annular portion 22 is connected to the inner edge 21c of the first annular portion 21. The height h2 of the second annular portion 22 is greater than the thickness w1 of the first annular portion 21. The coil 10 is sleeved on the outside of the second annular portion 22. The height h2 of the second annular portion 22 is in the thickness direction of the first annular portion 21 (i.e., the thickness direction Z of the magnetic ring 20), and is the dimension of the second annular portion 22.

[0104] The combination of the first annular portion 21 and the second annular portion 22 can further increase the inductance of the coil 10, improve the magnetic field coupling, and enhance the wireless charging efficiency. The first annular portion 21 and the second annular portion 22 can be an integral structure. The shapes of the second annular portion 22 and the first annular portion 21 are compatible.

[0105] For example, the first annular portion 21 is circular, and the second annular portion 22 is circular and connected to the inner edge 21c of the first annular portion 21.

[0106] For example, the first annular portion 21 is a rounded rectangle, and the second annular portion 22 is a rounded rectangle and is connected to the inner edge 21c of the first annular portion 21.

[0107] In other embodiments, see Figure 6 In (a) and (b), the magnetic ring 20 is configured as a first annular portion 21, but without a second annular portion 22. The coil 10 is disposed on the first surface 21a of the magnetic ring 20. A protective film 30 is disposed on the second surface 21b of the magnetic ring 20 to reduce the risk of the magnetic ring 20 breaking upon impact.

[0108] In some embodiments, see Figure 7 In (a) and (b), the magnetic ring 20 includes a first annular portion 21 and a third annular portion 23. The third annular portion 23 is connected to the outer edge 21d of the first annular portion 21. The height h3 of the third annular portion 23 is greater than the thickness w1 of the first annular portion 21. The coil 10 is located inside the third annular portion 23. The height h3 of the third annular portion 23 is in the thickness direction of the first annular portion 21 (i.e., the thickness direction Z of the magnetic ring 20), and this is the dimension of the third annular portion 23.

[0109] The combination of the first annular portion 21 and the third annular portion 23 can further increase the inductance of the coil 10, improve the magnetic field coupling, and enhance the wireless charging efficiency. The first annular portion 21 and the third annular portion 23 can be a single integrated structure. The shapes of the third annular portion 23 and the first annular portion 21 are compatible.

[0110] For example, the first annular portion 21 is circular, and the third annular portion 23 is circular and connected to the outer edge 21d of the first annular portion 21.

[0111] For example, the first annular portion 21 is a rounded rectangle, and the third annular portion 23 is a rounded rectangle and is connected to the outer edge 21d of the first annular portion 21.

[0112] In some embodiments, see Figure 8In (a) and (b), the magnetic ring 20 includes a first annular portion 21, a second annular portion 22, and a third annular portion 23. The second annular portion 22 is connected to the inner edge 21c of the first annular portion 21, and the height h2 of the second annular portion 22 is greater than the thickness w1 of the first annular portion 21. The third annular portion 23 is connected to the outer edge 21d of the first annular portion 21, and the height h3 of the third annular portion 23 is greater than the thickness w1 of the first annular portion 21. The second annular portion 22 and the third annular portion 23 are spaced apart, and the coil 10 is located between the second annular portion 22 and the third annular portion 23.

[0113] The combination of the first ring portion 21, the second ring portion 22, and the third ring portion 23 can further increase the inductance of the coil 10, improve the magnetic field coupling, and enhance the wireless charging efficiency. The first ring portion 21, the second ring portion 22, and the third ring portion 23 can be an integral structure. The shapes of the second ring portion 22 and the third ring portion 23 are adapted to the shape of the first ring portion 21.

[0114] For example, the first annular portion 21 is circular, the second annular portion 22 is circular and connected to the inner edge 21c of the first annular portion 21, and the third annular portion 23 is circular and connected to the outer edge 21d of the first annular portion 21.

[0115] For example, the first annular portion 21 is a rounded rectangle, the second annular portion 22 is a rounded rectangle and is connected to the inner edge 21c of the first annular portion 21, and the third annular portion 23 is a rounded rectangle and is connected to the outer edge 21d of the first annular portion 21.

[0116] In some embodiments, see Figures 4 to 8 The thinnest part of the first annular portion 21 has a thickness ranging from 0.40 mm to 0.60 mm. A protective film 30 is provided on the second surface 21b of the first annular portion 21 to reduce the risk of the magnetic ring 20 breaking upon impact. With a certain thickness, the wireless charging module 100 can reduce the thickness of the first annular portion 21, thereby increasing the number of turns of the coil 10 to improve wireless charging efficiency.

[0117] For example, the thickness of the thinnest part of the first annular portion 21 can be 0.40 mm, 0.42 mm, 0.45 mm, 0.48 mm, 0.50 mm, 0.52 mm, 0.55 mm, 0.58 mm, 0.60 mm, or any range of the two preceding numbers.

[0118] In some embodiments, see Figures 4 to 8The first surface 21a of the first annular portion 21 is perpendicular to the axis A1 of the magnetic ring 20. The axis A1 of the magnetic ring 20 is parallel to the thickness direction Z of the magnetic ring 20. When the thickness w1 of the first annular portion 21 is small, by providing a protective film 30 on the second surface 21b of the magnetic ring 20, even if the magnetic ring 20 is broken by a large impact force, the fragments of the magnetic ring 20 are still fixed together by the protective film 30, basically maintaining their original shape, and the magnetic conduction function is not lost.

[0119] In some embodiments, see Figures 9 to 11 In the direction from the inner edge 21c of the first annular portion 21 to the outer edge 21d of the first annular portion 21, the first surface 21a of the first annular portion 21 gradually approaches or moves away from the first plane P1, the first plane P1 is perpendicular to the axis A1 of the magnetic ring 20, and the second surface 21b of the first annular portion 21 is at least partially located on the first plane P1.

[0120] The thickness wmin at the thinnest point of the first annular portion 21 can be set to be very small, such as 0.4 mm to 0.6 mm. Taking the first plane P1 passing through the second surface 21b as the reference plane, the height of the first surface 21a of the first annular portion 21 gradually changes in the direction from the inner edge 21c to the outer edge 21d. This can be understood as the thickness of the first annular portion 21 gradually changing. The thicker part of the first annular portion 21 has greater structural strength, which can improve the overall structural strength and make the first annular portion 21 less prone to impact breakage, resulting in higher reliability. By providing a protective film 30 on the second surface 21b of the magnetic ring 20, even if the thinner part w1 of the first annular portion 21 breaks due to impact, the fragments of the magnetic ring 20 are still fixed together by the protective film 30, basically maintaining their original shape, and the magnetic conduction function is not lost.

[0121] For example, see Figure 10 , Figure 12 The thinnest part (i.e. the part with the smallest thickness) of the first annular portion 21 is close to the outer edge 21d of the first annular portion 21. In the direction from the inner edge 21c to the outer edge 21d of the first annular portion 21, the first surface 21a of the first annular portion 21 gradually approaches the first plane P1, and the thickness of the first annular portion 21 gradually decreases.

[0122] For example, see Figure 13 The thinnest part of the first annular portion 21 is close to the inner edge 21c of the first annular portion 21. In the direction from the inner edge 21c to the outer edge 21d of the first annular portion 21, the first surface 21a of the first annular portion 21 gradually moves away from the first plane P1, and the thickness of the first annular portion 21 gradually increases.

[0123] For example, the thinnest part of the first annular portion 21 is located in the middle between the outer edge 21d and the inner edge 21c of the first annular portion 21. In the direction from the inner edge 21c to the outer edge 21d of the first annular portion 21, the first surface 21a of the first annular portion 21 gradually approaches the first plane P1 and then gradually moves away from the first plane P1, and the thickness of the first annular portion 21 gradually decreases and then gradually increases.

[0124] In some embodiments, see Figure 4 and Figure 5 In the direction from the inner edge 21c to the outer edge 21d of the first annular portion 21, the first surface 21a of the first annular portion 21 gradually approaches or gradually moves away from the first plane P1. The shape of the connecting surface 11 is adapted to the shape of the first surface 21a of the first annular portion 21.

[0125] The coil 10 / ring 10a adopts a contour-following design, that is, the shape of the connecting surface 11 of the ring 10a is set according to the shape of the first surface 21a of the first ring portion 21, so that the connecting surface 11 of the ring 10a can be tightly attached to the first surface 21a of the first ring portion 21, and there is no excessive gap between the two.

[0126] Compared to the case where the first surface 21a is perpendicular to the axis A1 of the magnetic ring 20, in this embodiment, the coil 10 / ring 10a adopts a contour-following design with the same thickness of the coil 10 / ring 10a, which can increase the number of turns of the coil 10 to improve the wireless charging efficiency.

[0127] In some embodiments, see Figure 10 , Figures 12 to 14 The first surface 21a of the first annular portion 21 includes at least one of an inclined surface and an arcuate surface. The first surface 21a of the above forms can be fixedly connected to the coil 10.

[0128] See Figure 10 , Figure 12 , Figure 13 In the case where the first surface 21a of the first annular portion 21 includes an inclined surface, on the cross-section of the wireless charging module 100 through the axis A1 of the magnetic ring 20, the projection of the inclined surface is presented as a sloping side inclined relative to the axis A1 of the magnetic ring 20.

[0129] See Figure 14 In the case where the first surface 21a of the first annular portion 21 includes an arc-shaped surface, the projection of the arc-shaped surface on the cross-section of the wireless charging module 100 through the axis A1 of the magnetic ring 20 appears as an arc. The arc-shaped surface can be a convex arc surface, a concave arc surface, etc.

[0130] For example, see Figure 10 , Figure 12The thinnest part (i.e., the part with the smallest thickness) of the first annular portion 21 is near its outer edge 21d. The thickness of the first annular portion 21 gradually decreases in the direction from its inner edge 21c to its outer edge 21d. The first surface 21a of the first annular portion 21 is an inclined surface. The connecting surface 11 of the annular body 10a is an inclined surface, and the connecting surface 11 is fixed to the first surface 21a.

[0131] For example, see Figure 13 The thinnest part of the first annular portion 21 is close to its inner edge 21c. In the direction from the inner edge 21c to the outer edge 21d of the first annular portion 21, the first surface 21a of the first annular portion 21 gradually moves away from the first plane P1, and the thickness of the first annular portion 21 gradually increases. The first surface 21a of the first annular portion 21 is an inclined surface. The connecting surface 11 of the annular body 10a is an inclined surface, and the connecting surface 11 is fixed to the first surface 21a.

[0132] For example, see Figure 14 The thinnest part of the first annular portion 21 is near its outer edge 21d. The thickness of the first annular portion 21 gradually decreases in the direction from its inner edge 21c to its outer edge 21d. The first surface 21a of the first annular portion 21 is a concave arc surface. The connecting surface 11 of the annular body 10a is a convex arc surface, and the connecting surface 11 is fixed to the first surface 21a.

[0133] For example, the thinnest part of the first annular portion 21 is located at the middle between the outer edge 21d and the inner edge 21c of the first annular portion 21. In the direction from the inner edge 21c to the outer edge 21d of the first annular portion 21, the first surface 21a of the first annular portion 21 gradually approaches the first plane P1 and then gradually moves away from the first plane P1, and the thickness of the first annular portion 21 gradually decreases and then gradually increases. The first surface 21a includes an inclined surface and a concave arc surface. The inclined surface is disposed close to the axis A1 of the magnetic ring 20, and the concave arc surface is disposed away from the axis A1 of the magnetic ring 20. The connecting surface 11 of the annular body 10a includes an inclined surface and a convex arc surface. The inclined surface in the connecting surface 11 is fixed to the inclined surface in the first surface 21a, and the convex arc surface in the connecting surface 11 is fixed to the concave arc surface in the first surface 21a.

[0134] In some embodiments, see Figure 10 The thickness wmin at the thinnest point of the first annular portion 21 can be set to be very small, for example, 0.4 mm to 0.6 mm. The first surface 21a of the first annular portion 21 is at least partially inclined, and the inclination angle of the inclined surface relative to the first plane P1 is in the range of [5°, 50°].

[0135] On the cross-section of the wireless charging module 100 along the axis A1 of the magnetic ring 20, the projection of the inclined surface appears as a sloping side inclined relative to the axis A1 of the magnetic ring 20. The inclination angle of the inclined surface relative to the first plane P1 is the angle between the sloping side and the first plane P1.

[0136] The thicker part of the first annular portion 21 has greater structural strength, which can improve the overall structural strength and make the first annular portion 21 less prone to breakage from impact, thus ensuring high reliability. When the coil 10 is set on the second surface 21b of the first annular portion 21, the coil 10 has less impact on the length and width of the wireless charging module 100 (i.e., the vertical dimension of the axis A1 of the magnetic ring 20), making the wireless charging module 100 more compact.

[0137] In some embodiments, see Figure 3 and Figure 4 The second surface 21b of the first annular portion 21 is perpendicular to the axis A1 of the magnetic ring 20. The axis A1 of the magnetic ring 20 is parallel to the thickness direction Z of the magnetic ring 20. The second surface 21b of the first annular portion 21 is set as a plane to facilitate the assembly of the sheet-like protective film 30 onto the second surface 21b of the first annular portion 21.

[0138] When the wireless charging module 100 is applied to the electronic device 1000, the second surface 21b of the first annular portion 21 can face the motherboard of the electronic device 1000, so that the magnetic ring 20 occupies less space.

[0139] The magnetic ring 20 can be implemented in several ways. For example, as... Figure 6 The first annular portion 21 shown is as follows: Figure 5 The first annular portion 21 and the second annular portion 22 shown are combined, as follows: Figure 7 The first annular portion 21 and the third annular portion 23 shown are combined, as follows: Figure 8 The first annular portion 21, the second annular portion 22, and the third annular portion 23 shown are combined.

[0140] The first surface 21a of the first annular portion 21 can be implemented in several ways. For example, as Figures 4 to 8 As shown, the first surface 21a is perpendicular to the axis A1 of the magnetic ring 20; or, as... Figure 11 , Figure 12 As shown, in the direction from the inner edge 21c to the outer edge 21d of the first annular portion 21, the first surface 21a gradually approaches the first plane P1 at least partially; as Figure 13As shown, in the direction from the inner edge 21c to the outer edge 21d of the first annular portion 21, the first surface 21a gradually moves away from the first plane P1 at least partially; or, in the direction from the inner edge 21c to the outer edge 21d of the first annular portion 21, the first surface 21a of the first annular portion 21 gradually approaches the first plane P1 and then gradually moves away from the first plane P1.

[0141] It is understandable that the above-mentioned various implementation methods of the magnetic ring 20 and the various implementation methods of the first surface 21a can be used in any combination.

[0142] exist Figure 10 In the illustrated embodiment, the magnetic ring 20 is configured as a combination of a first annular portion 21 and a second annular portion 22. In the direction from the inner edge 21c to the outer edge 21d of the first annular portion 21, the first surface 21a gradually approaches the first plane P1 at least partially.

[0143] exist Figure 13 In the illustrated embodiment, the magnetic ring 20 may be configured as a first annular portion 21. In the direction from the inner edge 21c to the outer edge 21d of the first annular portion 21, the first surface 21a gradually moves away from the first plane P1 at least partially.

[0144] In some embodiments, see Figure 3 , Figure 4 The protective film 30 is annular. The annular protective film 30 is fixed to the second surface 21b of the first annular portion 21. This facilitates the arrangement of predetermined structures, such as the detection module 300 and other devices, inside the first annular portion 21, thereby improving space utilization.

[0145] In some embodiments, see Figure 4 and Figure 5 An adhesive bond is formed between the first surface 21a of the first annular portion 21 and the protective film 30. The use of an adhesive ensures a reliable connection between the first annular portion 21 and the protective film 30. The adhesive can be double-sided tape or applied in dots.

[0146] In some embodiments, see Figure 2 , Figure 3 and Figure 5 The first annular portion 21 has an opening 211 through which the end 12 of the coil 10 passes. The coil 10 is mounted on the first surface 21a of the first annular portion 21, and the end 12 of the coil 10 can pass through the opening 211 through the second surface 21b and then be led out to a predetermined position, such as a motherboard or a battery.

[0147] In some embodiments, see Figure 2 , Figure 3The wireless charging module 100 also includes a magnet 40, which is located inside the magnetic ring 20. A coil 10 is wound around the magnet 40. The magnet 40 is used for magnetic attraction with the wireless charger / device to be charged, achieving positioning and engagement between the wireless charger and the device to be charged, improving magnetic field coupling, and increasing wireless charging efficiency. The magnet 40 can be located on the side of the substrate 310 opposite to the detection element 320.

[0148] See Figures 9 to 14 This application provides a wireless charging module 100, including a coil 10 and a magnetic ring 20. The magnetic ring 20 includes a first annular portion 21, which has a first surface 21a and a second surface 21b distributed opposite to each other along the thickness direction Z of the magnetic ring 20. The coil 10 is a ring-shaped body 10a made of wire, and the ring-shaped body 10a has a connecting surface 11 on one side in the thickness direction. The connecting surface 11 is fixed to the first surface 21a of the first annular portion 21. In the direction from the inner edge 21c of the first annular portion 21 to the outer edge 21d of the first annular portion 21, the first surface 21a of the first annular portion 21 gradually approaches or gradually moves away from a first plane P1. The first plane P1 is perpendicular to the axis A1 of the magnetic ring 20, and the second surface 21b of the first annular portion 21 is at least partially located on the first plane P1.

[0149] The wireless charging module 100 provided in this application embodiment fixes the connecting surface 11 of the annular body 10a formed by the coil 10 to the first surface 21a of the magnetic ring 20. The magnetic ring 20 can increase the inductance value of the coil 10, improve the magnetic field coupling degree, and improve the wireless charging efficiency. Taking the first plane P1 passing through the second surface 21b as the reference plane, the height position of the first surface 21a of the first annular portion 21 gradually changes in the direction from the inner edge 21c to the outer edge 21d of the first annular portion 21. This can be understood as the thickness of the first annular portion 21 gradually changing. The thicker part of the first annular portion 21 has greater structural strength, which can improve the overall structural strength and make the first annular portion 21 less prone to impact breakage, resulting in higher reliability. Under a certain thickness dimension, the thickness dimension of the first annular portion 21 of the wireless charging module 100 can be reduced. For example, the thickness of the thinnest part of the first annular portion 21 can be reduced to 0.4 mm to 0.6 mm, thereby increasing the number of turns of the coil 10 to improve the wireless charging efficiency.

[0150] When it is necessary to confirm the wireless charging module 100 and electronic device 1000 of this embodiment, it can be confirmed by disassembly analysis or computed tomography that, in the direction from the inner edge 21c of the first annular portion 21 to the outer edge 21d of the first annular portion 21, the first surface 21a of the first annular portion 21 gradually approaches or moves away from the first plane P1, the first plane P1 is perpendicular to the axis A1 of the magnetic ring 20, and the second surface 21b of the first annular portion 21 is at least partially located on the first plane P1.

[0151] In some embodiments, see Figures 9 to 14 The wireless charging module 100 also includes a protective film 30, which is fixed to the second surface 21b of the first annular portion 21. The protective film 30, located on the second surface 21b of the magnetic ring 20, reduces the risk of breakage when subjected to impact. Even if the magnetic ring 20 breaks due to a large impact, the fragments are held together by the protective film 30, essentially maintaining its original shape, ensuring the magnetic conduction function remains intact and exhibiting high reliability.

[0152] It is understood that the wireless charging module 100 of the previous embodiment can be applied to the wireless charging module 100 of this embodiment, and will not be described again here.

[0153] In some embodiments, see Figure 3 and Figure 9 The electronic device 1000 also includes a detection module 300, which is located inside the first housing 210 and within the magnetic ring 20. The detection module 300 includes a substrate 310 and a detection element 320, with the detection element 320 disposed on the substrate 310 and facing towards the first housing 210. The detection module 300's location within the magnetic ring 20 fully utilizes the internal area, resulting in a smaller overall structural footprint. The detection module 300 can detect specific user information.

[0154] When the detection module 300 can be an optical volumetric recording module, the detection element 320 may include a light-emitting diode 321 and a photodiode 322. Alternatively, when the detection module 300 can be an electrocardiogram (ECG) module, the detection element 320 is an ECG sensor. Alternatively, when the detection module 300 can be a temperature detection module 300, the detection element 320 is a temperature sensor.

[0155] In some embodiments, see Figure 3 and Figure 9 The detection element 320 includes at least one of a photoplethysmography (PPG) sensor, an electrocardiogram (ECG) sensor, and a temperature sensor. One or more functions of the detection element 320 can be configured as needed. Different detection elements 320 can detect different user parameters.

[0156] Photoplethysmography (PPG) sensors use photoelectric sensors to detect the intensity of reflected light after it has been absorbed by human blood and tissues, and record the changes in blood vessel volume during the cardiac cycle. From the obtained pulse waveform, heart rate and blood oxygen can be calculated.

[0157] An electrocardiogram (ECG) sensor uses electrodes that come into contact with human skin to record the timing and intensity of electrical signals that cause the heart to beat.

[0158] Temperature sensors use temperature-sensitive elements to measure changes in human body temperature. Temperature sensors can be negative temperature coefficient (NTC) thermistors.

[0159] When the detection element 320 includes an optical volumetric sensor, the detection element 320 includes one or more light-emitting diodes (LEDs) 321 and one or more photoelectric diodes (PDs) 322. The LEDs 321 and PDs 322 are arranged at intervals. The light-emitting surface of the LED 321 faces away from the substrate 310, and the light-receiving surface of the PD 322 faces away from the substrate 310.

[0160] Light-emitting diode (LED) 321 is a semiconductor light-emitting device that emits light. Photodiode 322 is a semiconductor photodetector that converts light into electrical signals. LED 321 and photodiode 322 are disposed on substrate 310 and electrically connected to substrate 310. During operation, part of the light signal emitted by LED 321 is absorbed by the blood and tissues of the human body, and part of the light signal is reflected and received by photodiode 322. Based on the collected light signals, changes in blood vessel volume during the cardiac cycle can be recorded, and heart rate and blood oxygen levels can be calculated from the obtained pulse waveform. The combination and layout of LED 321 and photodiode 322 can be determined according to the optical path design.

[0161] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wireless charging module, characterized in that, include: Coil, magnetic ring, and protective film; The magnetic ring includes a first annular portion, which has a first surface and a second surface that are opposite to each other along the thickness direction of the magnetic ring; the coil is a ring-shaped body made of wire, which has a connecting surface on one side in the thickness direction of the ring, and the connecting surface is fixed to the first surface of the first annular portion; the protective film is fixed to the second surface of the first annular portion.

2. The wireless charging module according to claim 1, characterized in that, The magnetic ring further includes a second annular portion, which is connected to the inner edge of the first annular portion. The height of the second annular portion is greater than the thickness of the first annular portion, and the coil is sleeved on the outside of the second annular portion.

3. The wireless charging module according to claim 1, characterized in that, The magnetic ring further includes a third annular portion, which is connected to the outer edge of the first annular portion. The height of the third annular portion is greater than the thickness of the first annular portion, and the coil is located inside the third annular portion.

4. The wireless charging module according to any one of claims 1 to 3, characterized in that, In the direction from the inner edge of the first annular portion to the outer edge of the first annular portion, the first surface of the first annular portion gradually approaches or moves away from the first plane, the first plane is perpendicular to the axis of the magnetic ring, and the second surface of the first annular portion is at least partially located on the first plane.

5. The wireless charging module according to claim 4, characterized in that, The shape of the connecting surface is adapted to the shape of the first surface of the first annular portion.

6. The wireless charging module according to claim 5, characterized in that, The first surface of the first annular portion includes at least one of an inclined surface and an arcuate surface.

7. The wireless charging module according to claim 5, characterized in that, The first surface of the first annular portion is at least partially an inclined surface, and the inclined angle of the inclined surface relative to the first plane is in the range of [5°, 50°].

8. The wireless charging module according to any one of claims 1 to 3, characterized in that, The first surface of the first annular portion is perpendicular to the axis of the magnetic ring.

9. The wireless charging module according to any one of claims 1 to 3, characterized in that, The thickness range of the thinnest part of the first annular portion is [0.40 mm, 0.60 mm]; And / or, the second surface of the first annular portion is perpendicular to the axis of the magnetic ring; And / or, the protective film is annular; And / or, the first surface of the first annular portion and the protective film are bonded together with an adhesive. And / or, the first annular portion has an opening, through which the end of the coil passes; And / or, the wireless charging module further includes a magnet located inside the magnetic ring.

10. An electronic device, characterized in that, It includes a first housing and a wireless charging module as described in any one of claims 1 to 9, wherein the wireless charging module is disposed inside the first housing and the coil is disposed facing the first housing.

11. The electronic device according to claim 10, characterized in that, The electronic device further includes a detection module, which is disposed inside the first housing and located inside the magnetic ring. The detection module includes a substrate and a detection element, which is disposed on the substrate and faces the first housing.

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