Breakage-proof wireless charging antenna module and device

Abstract

The invention provides a breakage-proof wireless charging antenna module and a device thereof, the module comprises a flexible circuit board, a magnetic ring, a copper coil and an explosion-proof membrane, the magnetic ring is provided with a mounting gap and a mounting annular groove which are communicated, the copper coil is arranged in the mounting annular groove, and a part of structure of the copper coil faces the mounting gap. A part of structure of the flexible circuit board is located in the mounting gap, and the flexible circuit board is connected to the copper coil; the explosion-proof membrane is bonded to the face, away from the mounting annular groove, of the magnetic ring, and part of the structure of the explosion-proof membrane blocks the mounting notch. The explosion-proof membrane is adhered to the bottom surface and the edge of the magnetic ring, when the bottom or the side edge of the magnetic ring is subjected to external force, the explosion-proof membrane deforms through material characteristics to disperse the external force so as to reduce stress concentration of the bottom surface or the edge of the magnetic ring, and meanwhile, the explosion-proof membrane can absorb impact energy and reduce effective impact force transmitted to the magnetic ring. Therefore, the magnetic ring can be prevented from being broken due to external force or impact force and the like, and the wireless charging efficiency and the signal transmission stability are ensured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wireless charging, and in particular to an anti-shattering wireless charging antenna module and device. Background Art

[0002] In wireless charging antenna modules, the magnetic ring, as a core component, is typically made of ferrite, such as a magnet. This material has high magnetic permeability and low loss, improving magnetic field utilization, enhancing the coil's magnetic induction strength, and ensuring transmission efficiency. In existing technologies, wireless charging antenna modules primarily consist of a flexible printed circuit (FPC), a magnetic ring, and a copper coil. However, these modules are susceptible to local stress concentrations when subjected to collisions and vibrations during transportation, or external pressure during use. Ferrite is also susceptible to brittleness and can break easily due to external forces. This can lead to decreased wireless charging efficiency, unstable signal transmission, and even safety issues.

[0003] Currently, existing solutions lack targeted protection against the brittleness of magnetic rings. Some solutions increase the strength of the magnetic rings by increasing their thickness, but this increases module size and cost. Alternatively, they use a rigid external casing, but friction or collision between the casing and the magnetic rings still creates the possibility of breakage. Therefore, a feasible solution to prevent magnetic ring breakage is needed. Summary of the Invention

[0004] The purpose of the present disclosure is to overcome the shortcomings of the prior art and provide an anti-shattering wireless charging antenna module and device that prevents the magnetic ring from being damaged by external pressure, collision or vibration during use.

[0005] The purpose of this disclosure is achieved through the following technical solutions:

[0006] A crush-proof wireless charging antenna module includes a flexible circuit board, a magnetic ring, a copper coil and an explosion-proof membrane. The magnetic ring is provided with a connected mounting notch and an mounting annular groove. The copper coil is arranged in the mounting annular groove, and part of the structure of the copper coil faces the mounting notch. Part of the structure of the flexible circuit board is located in the mounting notch, and the flexible circuit board is connected to the copper coil; the explosion-proof membrane is bonded to a side of the magnetic ring away from the mounting annular groove, and part of the structure of the explosion-proof membrane blocks the mounting notch. The explosion-proof membrane is made of any one of polyethylene terephthalate, polyurethane and ethylene-vinyl acetate copolymer.

[0007] In one embodiment, the explosion-proof membrane is also bonded to the copper coil and the flexible circuit board respectively.

[0008] In one embodiment, the explosion-proof membrane includes a first side protection portion, a bottom protection portion and a second side protection portion arranged in sequence, the first side protection portion is bonded to the outer wall of the magnetic ring, the bottom protection portion is bonded to the side of the magnetic ring away from the mounting annular groove, and the second side protection portion is bonded to the inner wall of the magnetic ring.

[0009] In one embodiment, the first side protection portion includes a first side protection sub-portion and a first corner protection sub-portion, the first side protection sub-portion, the first corner protection sub-portion and the bottom protection portion are connected in sequence, the first side protection sub-portion is bonded to the outer wall of the magnetic ring, and the first corner protection sub-portion is bonded to the outer edge corner of the magnetic ring.

[0010] In one embodiment, the second side protection portion includes a second side protection sub-portion and a second corner protection sub-portion, the second side protection sub-portion, the second corner protection sub-portion and the bottom protection portion are connected in sequence, the second side protection sub-portion is bonded to the inner wall of the magnetic ring, and the second corner protection sub-portion is bonded to the inner edge corner of the magnetic ring.

[0011] In one embodiment, the anti-shattering wireless charging antenna module further includes a backing adhesive, the backing adhesive is adhered to the mounting annular groove, and the backing adhesive is also adhered to the copper coil.

[0012] In one embodiment, the flexible circuit board includes a first power connection portion, a bending transition portion, and a second power connection portion connected in sequence. The copper coil has a tail portion, and the first power connection portion is welded to the tail portion.

[0013] In one embodiment, the bending transition portion includes a first transition sub-portion, a bending sub-portion and a second transition sub-portion, and the first power connection portion, the first transition sub-portion, the bending sub-portion, the second transition sub-portion and the second power connection portion are connected in sequence.

[0014] In one embodiment, the explosion-proof membrane has a thickness of 0.05 to 0.3 mm.

[0015] A shatter-proof wireless charging antenna device includes the shatter-proof wireless charging antenna module described in any one of the above embodiments.

[0016] Compared with the prior art, the present disclosure has at least the following advantages:

[0017] The above-mentioned anti-shattering wireless charging antenna module adopts an explosion-proof film. Since the explosion-proof film is adhered to the bottom and edge of the magnetic ring, when the bottom or side of the magnetic ring is subjected to external force, such as external pressure, collision, vibration, etc., the explosion-proof film deforms through its material properties to disperse the external force, so as to reduce the stress concentration on the bottom or edge of the magnetic ring. At the same time, the explosion-proof film can also absorb impact energy and reduce the effective impact force transmitted to the magnetic ring. This can prevent the magnetic ring from being broken due to external force or impact, thereby ensuring the wireless charging efficiency and signal transmission stability of the wireless charging antenna module when it is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic structural diagram of an anti-shattering wireless charging antenna module in one embodiment;

[0020] Figure 2 for Figure 1 Schematic diagram of the explosion structure of the anti-shattering wireless charging antenna module shown;

[0021] Figure 3 for Figure 1 A schematic diagram of the structure of the flexible circuit board in the anti-shattering wireless charging antenna module shown;

[0022] Figure 4 for Figure 1 A partial structural diagram of the anti-shattering wireless charging antenna module shown;

[0023] Figure 5 for Figure 1 A cross-sectional view of the structure of the anti-shattering wireless charging antenna module without the copper coil installed;

[0024] Figure 6 for Figure 1 A cross-sectional view of the structure of the anti-shatter type wireless charging antenna module with a copper coil installed;

[0025] Figure 7 for Figure 6 A partial enlarged view of the anti-shattering wireless charging antenna module at point A is shown;

[0026] Figure 8 A cross-sectional view of the structure of an anti-shattering wireless charging antenna module in another embodiment;

[0027] Figure 9 for Figure 8 A partial enlarged view of the anti-shattering wireless charging antenna module at position B is shown;

[0028] Figure 10 for Figure 8 A partial enlarged view of the anti-shattering wireless charging antenna module at position C is shown;

[0029] Figure 11 for Figure 10 A partially enlarged view of another embodiment of the anti-shattering wireless charging antenna module is shown;

[0030] Figure 12 A cross-sectional view of the structure of an anti-shattering wireless charging antenna module in another embodiment;

[0031] Figure 13 for Figure 12 A partial enlarged view of the anti-shattering wireless charging antenna module at position D is shown;

[0032] Figure 14 for Figure 13 A partially enlarged view of another embodiment of the anti-shattering wireless charging antenna module is shown;

[0033] Figure 15 for Figure 13 A partially enlarged view of another embodiment of the anti-shattering wireless charging antenna module is shown.

[0034] Figure 10: Anti-shattering wireless charging antenna module; 100: flexible circuit board; 110: first power connection part; 111: first power connection metal sheet; 112: second power connection metal sheet; 120: bending transition part; 121: first transition sub-part; 122: bending sub-part; 123: second transition sub-part; 124: first bending sub-part; 125: second bending sub-part; 130: second power connection part; 200: magnetic ring; 210: mounting notch; 220: mounting annular groove; 221: vertical ring part; 222: inclined ring part; 223: horizontal ring part; 300: copper coil; 301: tail part; 400: explosion-proof membrane; 4 10. First side protection part; 411. First side protection sub-part; 412. First corner protection sub-part; 420. Bottom protection part; 430. Second side protection part; 431. Second side protection sub-part; 432. Second corner protection sub-part; 500. Adhesive; 510. Adhesive notch; 600. Buffer ring; 610. Side wall buffer part; 620. Corner buffer part; 630. Plane buffer part; 700. Top buffer ring; 710. Inner protection part; 720. Inner transition part; 730. Top protection part; 740. Outer transition part; 750. Outer protection part; 751. Mounting groove; 752. Arc area. DETAILED DESCRIPTION

[0035] To facilitate understanding of the present disclosure, a more comprehensive description of the present disclosure will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. The terms used herein in the specification of this disclosure are intended only to describe specific embodiments and are not intended to limit this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] In order to better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure is further described in detail below with reference to specific embodiments:

[0039] See also Figures 1 to 7 , which is an anti-shattering wireless charging antenna module 10 according to an embodiment of the present invention, includes a flexible circuit board 100, a magnetic ring 200, a copper coil 300 and an explosion-proof membrane 400. The magnetic ring 200 is provided with a connecting mounting notch 210 and an annular mounting groove 220. The copper coil 300 is disposed in the annular mounting groove 220, with a portion of the copper coil 300 facing the mounting notch 210. A portion of the flexible circuit board 100 is located in the mounting notch 210, and the flexible circuit board 100 is connected to the copper coil 300. The explosion-proof membrane 400 is bonded to a side of the magnetic ring 200 away from the annular mounting groove 220, and a portion of the explosion-proof membrane 400 blocks the mounting notch 210. It can be understood that the side away from the mounting annular groove 220 is the bottom surface of the magnetic ring 200 and the side surface adjacent to the bottom surface, and its bottom surface is set away from the mounting annular groove 220, and the side surface adjacent to the bottom surface is the outer side and inner side of the magnetic ring 200, so that the explosion-proof membrane 400 can protect the bottom surface of the magnetic ring 200 and the side surface adjacent to the bottom surface.

[0040] In this embodiment, the anti-shattering wireless charging antenna module 10 uses an explosion-proof membrane 400. Since the explosion-proof membrane 400 is adhered to the bottom and edge of the magnetic ring 200, when the bottom or side of the magnetic ring 200 is subjected to external forces, such as external pressure, collision, vibration, etc., the explosion-proof membrane 400 deforms and disperses the external force through its material properties to reduce the stress concentration on the bottom or edge of the magnetic ring 200. At the same time, the explosion-proof membrane 400 can also absorb impact energy and reduce the effective impact force transmitted to the magnetic ring 200. This can prevent the magnetic ring 200 from being broken by external forces or impacts, thereby ensuring the wireless charging efficiency and signal transmission stability of the wireless charging antenna module during operation. Specifically, the bottom surface of the magnetic ring 200 is used to correspond to the bottom of the mounting groove in the wireless charging mounting structure (such as a mobile phone, a car-mounted wireless charging device, a wireless charging mobile phone holder, etc.), and the side of the magnetic ring 200 is used to correspond to the inner side of the mounting groove in the wireless charging mounting structure.

[0041] In this embodiment, the explosion-proof membrane 400 is made of one of polyethylene terephthalate (PET), polyurethane (PU), and ethylene-vinyl acetate copolymer (EVA). It is understood that PET, polyurethane, or ethylene-vinyl acetate copolymer exhibits excellent softness, elasticity, and tear resistance. When used in a wireless charging antenna module, the internal structure typically heats up during operation. However, this material exhibits excellent high-temperature resistance, preventing structural fatigue due to temperature fluctuations, thereby ensuring the efficiency and safety of wireless charging.

[0042] In another embodiment, the anti-shattering wireless charging antenna module 10 further includes an adhesive layer (not shown), and the explosion-proof membrane 400 is bonded to the magnetic ring 200 via the adhesive layer. It is understood that the explosion-proof membrane 400 and the magnetic ring 200 are assembled by adding an adhesive to the bottom surface of the magnetic ring 200 to bond the explosion-proof membrane 400 to the magnetic ring 200, thereby further enhancing the connection strength between the explosion-proof membrane 400 and the magnetic ring 200, wherein the adhesive forms a bond. Further, the adhesive layer is an acrylic adhesive or an epoxy resin adhesive.

[0043] In another embodiment, the explosion-proof membrane 400 and the magnetic ring 200 are integrally formed. It is understood that the explosion-proof membrane 400 and the magnetic ring 200 can also be integrally formed through an in-mold injection molding process, thereby saving complex assembly steps.

[0044] In one embodiment, the thickness of the explosion-proof membrane 400 is 0.05-0.3 mm, which does not affect the overall thickness of the anti-shatter wireless charging antenna module 10 while ensuring the high magnetic permeability and low loss characteristics of the magnetic ring 200. In a preferred embodiment, the thickness of the explosion-proof membrane 400 is 0.15 mm.

[0045] In one embodiment, the explosion-proof membrane 400 is also bonded to the copper coil 300 and the flexible circuit board 100. In this embodiment, the copper coil 300 and the flexible circuit board 100 are welded to initially strengthen the connection between them, while the explosion-proof membrane 400 is bonded to the copper coil 300 and the flexible circuit board 100. On the one hand, the explosion-proof membrane 400 has the characteristics of electrical insulation and does not generate current. On the other hand, it can further strengthen the connection between the copper coil 300 and the flexible circuit board 100, preventing the connection between the copper coil 300 and the flexible circuit board 100 from cracking due to external impact or pressure. In other words, when the connection between the copper coil 300 and the flexible circuit board 100 is subjected to external force, the explosion-proof membrane 400 uses its own characteristics to disperse the external force, preventing the external force from damaging the connection between the copper coil 300 and the flexible circuit board 100. In this way, the explosion-proof membrane 400 can act as a buffer.

[0046] like Figure 6 and Figure 7 As shown, in one embodiment, the explosion-proof membrane 400 includes a first side protection portion 410, a bottom protection portion 420 and a second side protection portion 430 which are sequentially arranged. The first side protection portion 410 is bonded to the outer wall of the magnetic ring 200, the bottom protection portion 420 is bonded to the side of the magnetic ring 200 away from the mounting annular groove 220, and the second side protection portion 430 is bonded to the inner wall of the magnetic ring 200. It can be understood that since the first side protection portion 410 is bonded to the outer wall of the magnetic ring 200, that is, the first side protection portion 410 is bonded to the outer peripheral side wall of the magnetic ring 200 to protect the outer part of the magnetic ring 200, and the second side protection portion 430 is bonded to the inner wall of the magnetic ring 200 to protect the side wall of the hollow part of the magnetic ring 200; the bottom protection portion 420 is bonded to the bottom surface of the magnetic ring 200 to protect the bottom surface of the magnetic ring 200 and prevent structural damage caused by external force impact. Further, as Figure 7 As shown, the first side protection portion 410 includes a first side protection sub-portion 411 and a first corner protection sub-portion 412. The first side protection sub-portion 411, the first corner protection sub-portion 412, and the bottom protection portion 420 are sequentially connected. The first side protection sub-portion 411 is bonded to the outer wall of the magnetic ring 200, and the first corner protection sub-portion 412 is bonded to the outer edge corner of the magnetic ring 200. In this embodiment, the first corner protection sub-portion 412 is used to bond to the corner between the outer wall and the bottom of the magnetic ring 200. This can effectively protect the corner of the magnetic ring 200 and prevent external forces or impacts on the outer edge corner of the magnetic ring 200, causing localized breakage or the generation of magnetic ring 200 fragments. This further prevents the generated magnetic ring 200 fragments from damaging some components of the wireless charging device, causing a decrease in wireless charging power, failure of the wireless charging function, or even a safety accident.

[0047] Since the corner between the outer wall and the bottom of the magnetic ring 200 is more susceptible to external force and stress concentration than one side of the outer wall or the bottom, resulting in scratches or fragments, and the fragments will also scratch the magnetic ring 200 or the copper coil 300. Furthermore, the thickness of the first corner protection sub-portion 412 is greater than that of the first side protection sub-portion 411, and the thickness of the first corner protection sub-portion 412 is greater than that of the bottom protection portion 420, so that when the outer edge corner of the magnetic ring 200 is about to be subjected to external pressure or impact force, the explosion-proof membrane 400 has sufficient thickness at the bonding part of the corner, so that the explosion-proof membrane 400 can absorb the external force to a greater extent and disperse the external force to prevent the external force from acting on the outer edge corner of the magnetic ring 200, thereby preventing the outer edge corner of the magnetic ring 200 from being damaged and fragmented.

[0048] In another embodiment, Figure 7 As shown, the second side protection portion 430 includes a second side protection sub-portion 431 and a second corner protection sub-portion 432. The second side protection sub-portion 431, the second corner protection sub-portion 432, and the bottom protection portion 420 are sequentially connected. The second side protection sub-portion 431 is bonded to the inner wall of the magnetic ring 200, and the second corner protection sub-portion 432 is bonded to the inner edge corner of the magnetic ring 200. In this embodiment, the second corner protection sub-portion 432 is used to bond to the corner between the inner side wall and the bottom of the magnetic ring 200. This can effectively protect the corner of the magnetic ring 200 and prevent external forces or impacts on the inner edge corner of the magnetic ring 200, causing localized breakage or fragmentation of the magnetic ring 200. This further prevents the generated magnetic ring 200 fragments from damaging some components of the wireless charging device, causing a decrease in wireless charging power, failure of the wireless charging function, or even a safety accident.

[0049] Similarly, the corner between the inner wall and the bottom of the magnetic ring 200 is more susceptible to external force and stress concentration, resulting in scratches or fragments, and the fragments will also scratch the magnetic ring 200 or the copper coil 300. Furthermore, the thickness of the second corner protection sub-portion 432 is greater than that of the second side protection sub-portion 431, and the thickness of the second corner protection sub-portion 432 is greater than that of the bottom protection portion 420, so that when the inner edge corner of the magnetic ring 200 is about to be subjected to external pressure or impact force, the explosion-proof membrane 400 has sufficient thickness at the bonding point of the other corner, so that the explosion-proof membrane 400 can absorb the external force to a greater extent and disperse the external force to prevent the external force from acting on the outer edge corner of the magnetic ring 200, thereby preventing the outer edge corner of the magnetic ring 200 from being damaged and fragmented.

[0050] like Figure 6 and Figure 7As shown, in one embodiment, the anti-shattering wireless charging antenna module 10 further includes an adhesive backing 500, which is adhered to the mounting annular groove 220 and is also adhered to the copper coil 300. This allows the copper coil 300 to be placed on the mounting annular groove 220 through the adhesive backing 500. During transportation or use, the copper coil 300 is not easily separated from the mounting annular groove 220 due to the action of the adhesive backing 500. Furthermore, the adhesive backing 500 is provided with an adhesive notch 510, which is arranged corresponding to the mounting notch 210, so that part of the structure of the copper coil 300 is exposed through the adhesive notch 510 and the mounting notch 210 in sequence.

[0051] like Figures 5 to 7 As shown, in one embodiment, the mounting annular groove 220 has a vertical ring portion 221, an inclined ring portion 222 and a horizontal ring portion 223 connected in sequence, the adhesive backing 500 is arranged on the inclined ring portion 222, and the copper coil 300 is respectively abutted against the vertical ring portion 221, and the copper coil 300 is abutted against the inclined ring portion 222 through the adhesive backing 500, so that the copper coil 300 is arranged around the outer peripheral wall of the magnetic ring 200, and the magnetic ring 200 and the copper coil 300 are fixed by the adhesive backing 500. At the same time, the inclined installation of the copper coil 300 can also optimize the electromagnetic field distribution and improve the energy transmission efficiency through angle adjustment, and better approach the device with its own wireless charging module, so that the receiving coil of the device is close to the copper coil 300, forming a certain magnetic flux, and then the device can be charged.

[0052] like Figures 1 to 4 As shown, in one embodiment, the flexible circuit board 100 includes a first power connection portion 110, a bent transition portion 120, and a second power connection portion 130 connected in sequence. The copper coil 300 has a tail portion 301, and the first power connection portion 110 is welded to the tail portion 301. When the wireless charging antenna module is in operation, the copper coil 300 generates current, causing the hollow portion of the copper coil 300 to generate a magnetic field. This is usually achieved by connecting electricity. Then, the first power connection portion 110 is welded to the tail portion 301, so that the wireless charging power board and the copper coil 300 are electrically connected through the first power connection portion 110, the bent transition portion 120, and the second power connection portion 130. Furthermore, the second power connection portion 130 is used to electrically connect to the power supply end of the wireless charging power board.

[0053] Furthermore, if Figure 3As shown, the bent transition portion 120 includes a first transition sub-portion 121, a bent sub-portion 122, and a second transition sub-portion 123. The first power connection portion 110, the first transition sub-portion 121, the bent sub-portion 122, the second transition sub-portion 123, and the second power connection portion 130 are sequentially connected. It will be appreciated that when installing the anti-shatter wireless charging antenna module 10, the arrangement of the bent sub-portion 122 of the bent transition portion 120 of the flexible circuit board 100 allows the second power connection portion 130 to be connected to the wireless charging power board after the magnetic ring 200 is installed, either by bending the flexible circuit board 100 or not. This ensures convenient installation of the anti-shatter wireless charging antenna module 10, and even bending the flexible circuit board 100 does not affect the overall functionality.

[0054] like Figure 3 As shown, in another embodiment, the bent transition portion 120 includes a first bent sub-portion 124, a first transition sub-portion 121, an intermediate bent sub-portion 122, a second transition sub-portion 123 and a second bent sub-portion 125 connected in sequence. The first bent sub-portion 124 is also connected to the first power connection portion 110, and the second bent sub-portion 125 is connected to the second power connection portion 130. In this way, after the magnetic ring 200 is installed, one, two or three of the first bent sub-portion 124, the intermediate bent sub-portion 122 and the second bent sub-portion 125 can be bent so that the second power connection portion 130 can be electrically connected to the power supply end of the wireless charging power board, further ensuring the convenience of installing the anti-shattering wireless charging antenna module 10.

[0055] like Figure 3 and Figure 4 As shown, in one embodiment, the first power connection portion 110 includes a first power connection metal sheet 111 and a second power connection metal sheet 112 spaced apart. The tail portion 301 includes a first tail end and a second tail end. The first tail end is welded to the first power connection metal sheet 111, and the second tail end is welded to the second power connection metal sheet 112. This ensures that a current loop exists between the first tail end, the copper coil 300, and the second tail end, preventing short circuits. Furthermore, the distance between the first power connection metal sheet 111 and the magnetic ring 200 is 0.18 mm to 0.2 mm, and the distance between the second power connection metal sheet 112 and the magnetic ring 200 is 0.18 mm to 0.2 mm, to ensure that there is no risk of short circuits between the corresponding welds or metal sheets and the magnetic ring 200.

[0056] When the explosion-proof membrane 400 is added to the present solution, it can, to a certain extent, prevent the bottom and side surfaces of the magnetic ring 200 from structural damage caused by external forces, so as to ensure that the entire module can work normally. However, after the explosion-proof membrane 400 and the magnetic ring 200 are fitted together, during the batch transportation to the assembly department, when the corners near the installation annular groove 220, especially the corners between the horizontal ring portion 223 and the outer side of the magnetic ring 200, are bumped or vibrated, due to their own brittleness, there will be a certain degree of scratches at the corners, or fragments will be generated. The fragments may also scratch the magnetic rings 200 or copper coils 300 of other products, thereby destroying the integrity of the product.

[0057] Therefore, if Figure 8 and Figure 9 As shown, in one embodiment, the anti-shattering wireless charging antenna module 10 further includes a buffer ring 600. Part of the buffer ring 600 is located in the mounting annular groove 220, and the remaining part of the buffer ring 600 is located outside the magnetic ring 200, so that the buffer ring 600 is disposed around the magnetic ring 200. In this embodiment, part of the buffer ring 600 is located in the planar ring portion. It can be understood that because the buffer ring 600 has a certain buffering effect, when the corner between the buffer ring 600 and the outer side of the magnetic ring 200 is subjected to external force, the buffer ring 600 can absorb the external force and transmit the direction of the external force to the buffer ring 600 itself, thereby dispersing the external force, thereby preventing stress concentration in the structure of the magnetic ring 200 that is affected, resulting in cracking, or even the formation of magnetic ring 200 fragments due to cracking. This ensures that after the anti-shattering wireless charging antenna module 10 is assembled and transported in batches, it can ensure that multiple anti-shattering wireless charging antenna modules 10 will not be broken when subjected to external forces such as collisions between the buffer ring 600 and the outer side of the magnetic ring 200, thereby preventing the fragments from scratching other products. In this embodiment, the buffer ring 600 is made of one of polyethylene terephthalate (PET), polyurethane (PU), and ethylene-vinyl acetate copolymer (EVA).

[0058] like Figure 9As shown, in one embodiment, the buffer ring 600 includes a sidewall buffer portion 610, a corner buffer portion 620, and a plane buffer portion 630 connected in sequence. The sidewall buffer portion 610 is provided on the outer wall of the magnetic ring 200 adjacent to the mounting annular groove 220, the plane buffer portion 630 is provided on the mounting annular groove 220, and the corner buffer portion 620 is provided at the corner between the mounting annular groove 220 and the outer wall of the magnetic ring 200. In this embodiment, the sidewall buffer portion 610 is provided on the outer wall of the magnetic ring 200 adjacent to the plane ring portion, and the plane buffer portion 630 is provided on the plane ring portion. In this way, when the magnetic ring 200 is subjected to a structural bump or even falls due to an impact force at the mounting annular groove 220 position, at the outer wall position, or at the corresponding corner, the sidewall buffer portion 610, the corner buffer portion 620, and the plane buffer portion 630 can absorb the external force and disperse the external force to the buffer ring 600 itself, thereby preventing stress concentration at the corresponding position from causing structural breakage. Furthermore, the thickness of the corner buffer portion 620 is greater than the thickness of the side wall buffer portion 610, and the thickness of the corner buffer portion 620 is greater than the thickness of the plane buffer portion 630. Similarly, since the corner between the plane ring portion and the outer wall of the magnetic ring 200 is more prone to stress concentration and thus breakage than the outer wall itself, the corner buffer portion 620 needs to be thick enough compared to the plane buffer portion 630 and the side wall buffer portion 610 so that when the corner is subjected to external force, a certain amount of external force can be dispersed to prevent scratches or fragments from being generated at the corner.

[0059] Furthermore, the outer side of the corner buffer portion 620 is rounded so that its surface area is sufficient to offset external forces.

[0060] In addition, when the magnetic ring 200 is struck or dropped, if the corner between the top of the magnetic ring 200 and the mounting annular groove 220 is first subjected to external force, scratches or fragments may appear at the corner. Similarly, scratches or fragments may also damage the integrity of the magnetic ring 200. Therefore, in one embodiment, if Figure 8 and Figure 10 As shown, the anti-shattering wireless charging antenna module 10 further includes a top buffer ring 700, which is respectively disposed on the top of the magnetic ring 200 and the mounting annular groove 220. In this embodiment, the top buffer ring 700 is respectively disposed on the top of the magnetic ring 200 and the vertical ring portion 221. It can be understood that the top buffer ring 700 has a certain buffering effect, which can absorb external forces acting on the top and vertical ring portion 221 of the magnetic ring 200. Even if the magnetic ring 200 is shocked or dropped, and its top is first subjected to the force, the top buffer ring 700 absorbs the external force to disperse it, thereby preventing the top of the magnetic ring 200, the vertical ring portion 221, and the corner between the top and the vertical ring portion 221 from being scratched or even broken.

[0061] In this embodiment, the top buffer ring 700 is made of a non-magnetic material, such as rubber, polyurethane, polyethylene, etc., to prevent the magnetic ring 200 and the material from being magnetized mutually and affecting the magnetic conductivity.

[0062] Furthermore, if Figure 11 As shown, part of the structure of the top buffer ring 700 is also arranged on the inner wall of the magnetic ring 200 adjacent to the top to further protect the top part of the magnetic ring 200, especially the corners on both sides of the top, to prevent stress concentration at the corners from causing fragmentation when subjected to external force.

[0063] In another embodiment, Figure 11 As shown, the top buffer ring 700 includes an inner protection portion 710, an inner transition portion 720, a top protection portion 730, an outer transition portion 740, and an outer protection portion 750 connected in sequence. The top protection portion 730 is provided at the top of the magnetic ring 200. The inner protection portion 710 is located adjacent to the inner wall of the top of the magnetic ring 200. The outer protection portion 750 is provided on one side of the mounting annular groove 220 adjacent to the top. The inner transition portion 720 is provided at the corner between the inner wall and the top of the magnetic ring 200. The outer transition portion 740 is provided at the corner between the mounting annular groove 220 and the top of the magnetic ring 200. In this way, when the inner transition portion 720 and the outer transition portion 740 are provided, as long as the two corners of the magnetic ring 200 are subject to external forces, the corners of the top buffer ring 700 can absorb the external forces, thereby preventing stress concentration at the corners. Furthermore, the thickness of the inner transition portion 720 is greater than the thickness of the inner protection portion 710, the top protection portion 730 and the outer protection portion 750, and the thickness of the outer transition portion 740 is greater than the thickness of the inner protection portion 710, the top protection portion 730 and the outer protection portion 750, so that the surfaces of the inner transition portion 720 and the outer transition portion 740 have sufficient thickness to offset external force and can disperse the external force.

[0064] Furthermore, the outer sides of the inner transition portion 720 and / or the outer transition portion 740 are both rounded, so that their surfaces have sufficient area to offset external forces.

[0065] In another embodiment, Figure 12 and Figure 13 As shown, the copper coil 300 abuts against the outer protection portion 750 to increase the friction between the copper coil 300 and the top buffer ring 700 .

[0066] However, the outer portion of the outer protection portion 750 is parallel to the vertical plane. During the installation of the copper coil 300, due to the certain elasticity of the copper coil 300, the forces acting on the inner portion of the copper coil 300 and the various positions of the outer protection portion 750 are the same, so that when the product is transported, it is subjected to up and down vibrations, which drives the copper coil 300 to overcome the current friction and move a certain distance. Over time, the vibration will cause the copper coil 300 to easily detach from the vertical direction of the outer protection portion 750, making it difficult to ensure the overall quality of the product.

[0067] To solve the above problems, combined Figure 11 and Figure 14 As shown, in one embodiment, a mounting groove 751 is provided on the outer side of the outer protection portion 750 , and the mounting groove 751 is arranged adjacent to the mounting annular groove 220 , specifically, adjacent to the inclined ring portion 222 , and part of the structure of the copper coil 300 also abuts against the mounting groove 751 . In this embodiment, the distance between the outer side of the outer protection portion 750 and the magnetic ring 200 is greater than the distance between the groove wall of the installation groove 751 and the magnetic ring 200. In this way, when the copper coil 300 is installed, since the copper coil 300 has a certain elasticity, the degree of deformation when passing through the outer protection portion 750 is greater than the degree of deformation when passing through the installation groove 751, and when the installation is completed, the inner side of the copper coil 300 rebounds and is stuck in the installation groove 751. In this way, when the entire module is subjected to up and down shaking or vibration, the copper coil 300 needs to overcome the force between the outer protection portion 750 before it can be separated from the magnetic ring 200. In addition, in the case of shaking or vibration, the copper coil 300 always presses against the inner wall of the installation groove 751, suppressing the up and down displacement of the copper coil 300 caused by the up and down vibration, and thus making it less likely that the copper coil 300 will be separated.

[0068] In another embodiment, combined Figure 11 and Figure 15As shown, the outer side of the outer protection portion 750 has an arc-shaped area 752, and the arc-shaped area 752 is arranged between the outer protection portion 750 and the mounting annular groove 220, and when the arc-shaped area 752 approaches the mounting arc-shaped groove 220 along the axial direction of the magnetic ring 200, the thickness of the arc-shaped area 752 gradually decreases. In this embodiment, when the arc-shaped area 752 approaches the inclined ring portion 222 along the axial direction of the magnetic ring 200, the thickness of the arc-shaped area 752 gradually decreases. It can be understood that during the installation of the copper coil 300, similarly, the copper coil 300 has a certain elasticity and will be subjected to a certain deformation when passing through the outer protective portion 750. When the copper coil 300 moves in the direction close to the inclined ring portion 222, due to the gradual decrease in the thickness of the arc-shaped area 752, the copper coil 300 rebounds and is stuck on the outer wall of the arc-shaped area 752. In this way, the degree of deformation of the copper coil 300 at the position of the arc-shaped area 752 is lower than the degree of deformation of the outer wall of the outer protective portion 750. Therefore, when the entire module is vibrated, the copper coil 300 always rests on the outer wall of the arc-shaped area 752, which increases the threshold for the copper coil 300 to detach from the magnetic ring 200, suppresses the up and down displacement of the copper coil 300 caused by the up and down vibration, and thus it is not easy for the copper coil 300 to detach.

[0069] The present disclosure also provides a method for manufacturing a shatter-resistant wireless charging antenna module, comprising some or all of the following steps:

[0070] S101. Provide an explosion-proof membrane, a magnetic ring, a flexible circuit board, and a copper coil. It is understood that providing the explosion-proof membrane and magnetic ring is preparatory for the next assembly step, while providing the flexible circuit board and copper coil is preparatory for subsequent assembly steps. The explosion-proof membrane can be made of polyethylene terephthalate (PET), polyurethane (PU), ethylene-vinyl acetate copolymer (EVA), or a combination of PET and EVA (PET layer + EVA layer). The magnetic ring is preferably ferrite.

[0071] S102. Apply adhesive to the bottom of the magnetic ring, and leave a blank area at the bottom edge of the magnetic ring. In this embodiment, after obtaining the magnetic ring, apply adhesive to its bottom to prepare for the bonding of the explosion-proof membrane and the magnetic ring. At the same time, leave a blank area at the bottom edge of the magnetic ring so that the explosion-proof membrane and the magnetic ring can be fully bonded and there will be no glue overflow, thereby reducing subsequent unnecessary operations, such as removing glue from the outer edge.

[0072] S103, align the explosion-proof film with the bottom of the magnetic ring and fit it so that the explosion-proof film and the magnetic ring are bonded; it can be understood that after the adhesive is applied, the explosion-proof film is prepared in the next step, so that it is aligned with the bottom of the magnetic ring and fits it. During the fitting, the adhesive is deformed, so that it extends along the reserved blank area, so that every position of the explosion-proof film can be fitted with the magnetic ring through the adhesive, wherein the adhesive forms an adhesive layer after being left to stand.

[0073] S104: Assemble the explosion-proof film-covered magnetic ring with the flexible circuit board and copper coil to form a shatterproof wireless charging antenna module. In this embodiment, once the explosion-proof film and magnetic ring are fully bonded, the next step is to assemble the flexible circuit board and copper coil to form the shatterproof wireless charging antenna device of this solution.

[0074] In one embodiment, after executing S103 and before executing S104, the following step is further included: curing the magnetic ring with the explosion-proof film attached. In this embodiment, after the explosion-proof film and the magnetic ring are attached using an adhesive, the adhesive needs to be cured because the adhesive has a certain degree of fluidity. Furthermore, the magnetic ring with the explosion-proof film attached is placed in an oven for curing until the adhesive is completely cross-linked.

[0075] In one embodiment, the magnetic ring with the explosion-proof film is cured for 2 hours to gradually reduce the fluidity of the adhesive, further and fully strengthen the connection strength between the explosion-proof film and the magnetic ring, and ensure the production quality of subsequent products.

[0076] In one embodiment, when executing S103, the following step is included: applying a pressure of 0.5 MPa to the magnetic ring with the explosion-proof film attached thereto for 30 seconds. This pressure is lower than normal pressure, representing a vacuum pressure condition, thereby ensuring that no bubbles form in any part of the explosion-proof film and that every part of the explosion-proof film is in contact with the magnetic ring.

[0077] The present disclosure also provides another method for manufacturing an anti-shattering wireless charging antenna module, comprising some or all of the following steps:

[0078] S201. Set an explosion-proof membrane molding cavity, wherein the size of the explosion-proof membrane molding cavity is equal to the size of the bottom surface of the magnetic ring, so that when the magnetic ring prevents the explosion-proof membrane molding cavity at the bottom of the injection mold, it can match the size of the explosion-proof membrane molding cavity. In this way, there will be no obvious shaking during the subsequent injection molding operation, thereby ensuring the normal fit between the explosion-proof membrane and the magnetic ring.

[0079] S202, placing the magnetic ring into the explosion-proof membrane molding cavity to prepare the injection molding raw materials in advance.

[0080] S203, injecting the injection molding material into the bottom of the magnetic ring. It is understood that after the magnetic ring is placed, the injection molding material is injected into the bottom of the magnetic ring to prepare for the injection molding operation. Furthermore, the injection molding material can be PU (polyurethane) material, PET (polyethylene terephthalate) material, etc.

[0081] S204. The injection molding step is performed on the injection molding material to form an explosion-proof membrane, thereby producing a magnetic ring containing the explosion-proof membrane. Furthermore, during the injection molding step, the injection molding temperature is set at 80° C. and the injection molding pressure is set at 10 MPa to increase the temperature of the injection molding material. Under sufficient pressure, the injection molding material is pressed against the bottom of the magnetic ring to ensure that the layer formed by the injection molding material is tightly bonded to the bottom of the magnetic ring. The layer formed by the injection molding material is the explosion-proof membrane layer, which is also the explosion-proof membrane of this solution.

[0082] S205: Assemble the magnetic ring containing the explosion-proof membrane with the flexible circuit board and the copper coil to form a shatter-resistant wireless charging antenna module. In this embodiment, once the explosion-proof membrane and the magnetic ring are fully bonded, the next step is to assemble the flexible circuit board and the copper coil to form the shatter-resistant wireless charging antenna device of this solution.

[0083] In one embodiment, after executing S204, the following step is further included: trimming the magnetic ring containing the explosion-proof membrane. It is understood that after the magnetic ring containing the explosion-proof membrane is manufactured, i.e., after the injection molding operation is completed, the explosion-proof membrane layer of the magnetic ring has some burrs. To maintain the overall appearance of the magnetic ring containing the explosion-proof membrane, the edges of the burrs need to be trimmed to ensure that there is no interference with other components of the module.

[0084] The present disclosure further provides an anti-shattering wireless charging antenna device, comprising any one of the anti-shattering wireless charging antenna modules 10 in the above embodiments.

[0085] Compared with the prior art, the present disclosure has at least the following advantages:

[0086] The above-mentioned anti-shattering wireless charging antenna module 10 adopts an explosion-proof membrane 400. Since the explosion-proof membrane 400 is adhered to the bottom and edge of the magnetic ring 200, when the bottom or side of the magnetic ring 200 is subjected to external force, such as external pressure, collision, vibration, etc., the explosion-proof membrane 400 deforms through its material properties to disperse the external force, so as to reduce the stress concentration on the bottom or edge of the magnetic ring 200. At the same time, the explosion-proof membrane 400 can also absorb impact energy and reduce the effective impact force transmitted to the magnetic ring 200, thereby preventing the magnetic ring 200 from being broken due to external force or impact, etc., thereby ensuring the wireless charging efficiency and signal transmission stability of the wireless charging antenna module during operation.

[0087] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the disclosed patent shall be determined by the appended claims.

Claims

1. A shatterproof wireless charging antenna module, characterized in that: Including flexible circuit board, magnetic ring, copper coil and explosion-proof film, The magnetic ring is provided with a connecting mounting notch and a mounting annular groove. The copper coil is arranged in the mounting annular groove, with a portion of the copper coil facing the mounting notch. A portion of the flexible circuit board is located in the mounting notch, and the flexible circuit board is connected to the copper coil. The explosion-proof membrane is bonded to the side of the magnetic ring away from the mounting annular groove, and a part of the structure of the explosion-proof membrane blocks the mounting gap. The explosion-proof membrane is made of any one of polyethylene terephthalate, polyurethane and ethylene-vinyl acetate copolymer.

2. The anti-shattering wireless charging antenna module according to claim 1, characterized in that: The explosion-proof membrane is also bonded to the copper coil and the flexible circuit board respectively.

3. The anti-shattering wireless charging antenna module according to claim 1, characterized in that: The explosion-proof membrane includes a first side protection portion, a bottom protection portion and a second side protection portion arranged in sequence, the first side protection portion is bonded to the outer wall of the magnetic ring, the bottom protection portion is bonded to the side of the magnetic ring away from the mounting annular groove, and the second side protection portion is bonded to the inner wall of the magnetic ring.

4. The anti-shattering wireless charging antenna module according to claim 3, characterized in that: The first side protection portion includes a first side protection sub-portion and a first corner protection sub-portion. The first side protection sub-portion, the first corner protection sub-portion and the bottom protection portion are connected in sequence. The first side protection sub-portion is bonded to the outer wall of the magnetic ring, and the first corner protection sub-portion is bonded to the outer edge corner of the magnetic ring.

5. The anti-shattering wireless charging antenna module according to claim 3, characterized in that: The second side protection portion includes a second side protection sub-portion and a second corner protection sub-portion. The second side protection sub-portion, the second corner protection sub-portion and the bottom protection portion are connected in sequence. The second side protection sub-portion is bonded to the inner wall of the magnetic ring, and the second corner protection sub-portion is bonded to the inner edge corner of the magnetic ring.

6. The anti-shattering wireless charging antenna module according to claim 1, characterized in that: The anti-shattering wireless charging antenna module further includes a backing adhesive, which is adhered to the mounting annular groove and is also adhered to the copper coil.

7. The anti-shattering wireless charging antenna module according to claim 1, characterized in that: The flexible circuit board includes a first power connection portion, a bending transition portion and a second power connection portion which are connected in sequence. The copper coil has a tail portion, and the first power connection portion is welded to the tail portion.

8. The anti-shattering wireless charging antenna module according to claim 7, characterized in that: The bending transition portion includes a first transition sub-portion, a bending sub-portion and a second transition sub-portion, and the first power connection portion, the first transition sub-portion, the bending sub-portion, the second transition sub-portion and the second power connection portion are connected in sequence.

9. The anti-shattering wireless charging antenna module according to claim 1, characterized in that: The thickness of the explosion-proof membrane is 0.05-0.3 mm.

10. A shatterproof wireless charging antenna device, characterized in that: It comprises the anti-shattering wireless charging antenna module as described in any one of claims 1 to 9.

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