Double-sided magnetic attraction wireless charger

Abstract

The utility model discloses a double-sided magnetic attraction wireless charger which comprises a shell, a main coil module, a positioning magnetic ring assembly, a shielding inner shell, an auxiliary coil module and a circuit main board are arranged in the shell, electronic elements are arranged on the back face of the circuit main board, the main coil module is arranged between the top face of the circuit main board and the top face of the shell, and the positioning magnetic ring assembly is arranged between the main coil module and the circuit main board. The secondary coil module is arranged between the back face of the shielding inner shell and the back face of the shell, the positioning magnetic ring assembly surrounds the outer side of the primary coil module, the shielding inner shell comprises a sunken part which is sunken towards the back face, and the circuit mainboard covers the top face of the shielding inner shell. And electronic elements on the back surface of the circuit mainboard are accommodated in the sunken part. The double-sided charging device has a double-sided charging function, is small in size, and can prevent electromagnetic radiation and heat from influencing the performance of the circuit mainboard.

Description

Technical Field

[0001] The utility model relates to a wireless charger, in particular to a double-sided magnetic wireless charger. Background Art

[0002] Wireless chargers are devices that charge smart devices by radiating electromagnetic energy. In order to meet the needs of charging multiple devices at the same time, existing wireless chargers generally set up multiple charging positions on the surface of the charger at the same time. Because the multiple charging positions are arranged along the surface of the charger, the overall size of the charger is large, which cannot meet the requirements of small size and portability. At the same time, the coil and PCB board of the existing wireless charger are generally arranged in an up-and-down stacking arrangement. Even if there is a magnetic shielding sheet on the bottom of the coil, the magnetic shielding sheet has limited ability to absorb electromagnetic energy. Especially with the increase of wireless charging power, it is difficult for the magnetic shielding sheet to completely absorb the electromagnetic energy on the back of the coil. These leaked electromagnetic radiations will directly affect the working performance of the PCB board, thereby reducing the safety and reliability of the wireless charger. In addition, because the PCB board itself will generate a certain amount of heat, the existing wireless charger generally hides the PCB board in the shell under the coil. The heat generated by the PCB board is difficult to dissipate effectively, which will also cause the working performance of the PCB board to decline. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a double-sided magnetic wireless charger with double-sided charging function, compact size, and the ability to avoid electromagnetic radiation and heat affecting the performance of the circuit board, in view of the shortcomings of the existing technology.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions.

[0005] A double-sided magnetic wireless charger comprises a shell, wherein a main coil module, a positioning magnetic ring assembly, a shielding inner shell, a secondary coil module and a circuit mainboard with electronic components arranged on the back are arranged in the shell, the main coil module is arranged between the top surface of the circuit mainboard and the top surface of the shell, the secondary coil module is arranged between the back surface of the shielding inner shell and the back surface of the shell, the positioning magnetic ring assembly surrounds the outside of the main coil module, the shielding inner shell comprises a recessed portion recessed toward the back surface, the circuit mainboard covers the top surface of the shielding inner shell, and the electronic components on the back surface of the circuit mainboard are accommodated in the recessed portion.

[0006] Preferably, an opening is provided at the edge of the circuit main board, a main coil wire is provided at the edge of the main coil module, the main coil wire passes through the opening and enters the recessed portion, and the main coil wire is welded to the circuit main board.

[0007] Preferably, the recessed portion is circular, an avoidance portion is formed on the edge of the recessed portion, a avoidance opening is opened on the avoidance portion, a solder point group is provided on the back side of the circuit main board, the solder point group is arranged in the avoidance opening, and the leads of the secondary coil module are welded to the solder point group.

[0008] Preferably, the shielding inner shell is a metal shielding inner shell, and the shell is a metal shell.

[0009] Preferably, an annular step portion is provided between the recessed portion and the edge of the shielding inner shell, an annular support portion is formed on the inner edge of the shell, and the annular step portion abuts against the top of the annular support portion.

[0010] Preferably, a magnetic reinforcement ring is included, the positioning magnetic ring assembly is attracted to the top surface of the magnetic reinforcement ring, and the bottom surface of the magnetic reinforcement ring is bonded to the edge of the top surface of the circuit main board through an annular foam.

[0011] Preferably, the positioning magnetic ring assembly comprises a plurality of magnet units, and the magnet units are coplanar bipolar independent magnets or magnet groups composed of two magnets with opposite magnetic poles arranged in sequence along the radial direction.

[0012] Preferably, a power interface board is provided between the recessed portion and the secondary coil module, leads of the power interface board are welded to the welding point group, and a power interface is provided at an edge of the power interface board.

[0013] Preferably, a top plate is provided on the top surface of the shell, and the top plate covers the top of the main coil module and the positioning magnetic ring assembly. A circular convex cover is fixed on the back side of the shell, and the secondary coil module is arranged in the circular convex cover.

[0014] Preferably, a finger ring is provided at the bottom of the shell, and the finger ring surrounds the outer side of the circular convex cover. A first hinge is provided at the edge of the finger ring, and a second hinge is provided at the edge of the shell. The first hinge and the second hinge are hingedly connected by a damping shaft passing through the two.

[0015] In the double-sided magnetic wireless charger disclosed by the utility model, the mobile phone or smart watch can be charged separately by using the top and back sides of the wireless charger, or the mobile phone and the smart watch can be simultaneously attached to the top and back sides of the wireless charger, thereby charging the mobile phone and the smart watch at the same time. Compared with the prior art, the overall size of the utility model is more compact, so it is convenient to carry and use. In addition, the utility model is provided with a shielding inner shell in the shell, and the circuit main board is covered on the top surface of the shielding inner shell and covers the recessed portion, so that the electronic components on the back of the circuit main board are accommodated in the recessed portion, and the board body of the circuit main board can shield the electromagnetic radiation leaked by the main coil module. The specific shielding method includes surface copper plating and utilizing the board body's own blocking ability, etc., thereby avoiding electromagnetic radiation from affecting the working performance of the circuit main board, which can effectively improve the working stability and reliability of the wireless charger, and greatly improve the quality of the wireless charger product. Furthermore, in order to play a shielding role, the shielding inner shell is usually a metal inner shell. The heat generated by the electronic components during operation will be transferred to the shell by the shielding inner shell, and then dissipated by the shell. This can improve the heat dissipation capacity of the circuit board and the electronic components, further ensuring the reliable operation of the wireless charger. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of the double-sided magnetic wireless charger of the utility model in the unfolded state;

[0017] Figure 2 Partial disassembly of the double-sided magnetic wireless charger of the utility model Figure 1 ;

[0018] Figure 3 Partial disassembly of the double-sided magnetic wireless charger of the utility model Figure 2 ;

[0019] Figure 4 Partial disassembly of the double-sided magnetic wireless charger of the utility model Figure 3 ;

[0020] Figure 5 To shield the structure of the inner shell and the circuit board Figure 1 ;

[0021] Figure 6 To shield the structure of the inner shell and the circuit board Figure 2 ;

[0022] Figure 7 A comparative view of three alternatives for magnet units;

[0023] Figure 8 The utility model double-sided magnetic wireless charger is a three-dimensional Figure 1 ;

[0024] Fig. 9 The utility model double-sided magnetic wireless charger is a three-dimensional Figure 2 . DETAILED DESCRIPTION

[0025] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

[0026] The utility model discloses a double-sided magnetic wireless charger, combined with Figures 1 to 6 As shown, it includes a shell 1, in which a main coil module 10, a positioning magnetic ring assembly 11, a shielding inner shell 12, a secondary coil module 13 and a circuit main board 14 with electronic components arranged on the back are arranged. The main coil module 10 is arranged between the top surface of the circuit main board 14 and the top surface of the shell 1, the secondary coil module 13 is arranged between the back surface of the shielding inner shell 12 and the back surface of the shell 1, the positioning magnetic ring assembly 11 surrounds the outside of the main coil module 10, the shielding inner shell 12 includes a recessed portion 120 recessed toward the back, the circuit main board 14 covers the top surface of the shielding inner shell 12, and the electronic components on the back of the circuit main board 14 are accommodated in the recessed portion 120.

[0027] In the above structure, the top surface of the shell 1 is used to fit the smart device to be charged, the charging surface of the main coil module 10 is aligned with the top surface of the shell 1, and the main coil module 10 can be used to wirelessly charge smart devices such as mobile phones. The charging surface of the secondary coil module 13 is aligned with the back of the shell 1, and the secondary coil module 13 can be used to wirelessly charge electronic devices such as smart watches. In actual applications, the mobile phone or smart watch can be charged separately with the top and back sides of the wireless charger, or the mobile phone and the smart watch can be simultaneously adsorbed on the top and back sides of the wireless charger, thereby charging the mobile phone and the smart watch at the same time. Compared with the product in the prior art in which multiple charging positions are arranged in sequence on the shell surface, the overall size of the utility model is more compact, which is convenient to carry and use. In addition, the utility model sets a shielding inner shell 12 in the shell 1, covers the circuit main board 14 on the top surface of the shielding inner shell 12 and covers the recessed portion 120, so that the electronic components 140 on the back of the circuit main board 14 are accommodated in the recessed portion 120, and the board body of the circuit main board 14 can shield the electromagnetic radiation leaked from the main coil module 10. The specific shielding method includes surface copper plating and utilizing the board body's own blocking ability, etc., thereby preventing electromagnetic radiation from affecting the working performance of the circuit main board 14, which can effectively improve the working stability and reliability of the wireless charger, and greatly improve the quality of the wireless charger product. Furthermore, in order to play a shielding role, the shielding inner shell 12 is usually a metal inner shell, and the heat generated by the electronic components 140 during operation will be transferred to the shell 1 by the shielding inner shell 12, and then dissipated by the shell 1, thereby improving the heat dissipation capacity of the circuit main board 14 and the electronic components 140, and further ensuring the reliable operation of the wireless charger.

[0028] Combination Figure 3 and Figure 4 As shown, in order to facilitate wiring, in the present embodiment, an opening 141 is provided at the edge of the circuit main board 14, and a main coil wire 101 is provided at the edge of the main coil module 10. The main coil wire 101 passes through the opening 141 and enters the recessed portion 120, and the main coil wire 101 is welded to the circuit main board 14.

[0029] Combination Figures 3 to 5As shown, the housing 1 in this embodiment is preferably a circular housing, and accordingly, the circuit main board 14 and the shielding inner shell 12 are also circular. On this basis, the recessed portion 120 is circular, and a avoidance portion 121 is formed at the edge of the recessed portion 120, and a avoidance opening 122 is opened on the avoidance portion 121. A soldering point group 142 is provided on the back of the circuit main board 14, and the soldering point group 142 is arranged in the avoidance opening 122, and the lead wire of the secondary coil module 13 is welded to the soldering point group 142. In the above structure, the circuit main board 14 and the shielding inner shell 12 are reliably fitted, so that the recessed portion 120 is buckled outside the electronic component 140, which can not only shield electromagnetic radiation, but also assist in heat dissipation. At the same time, the avoidance opening 122 is provided at the position of the avoidance portion 121 in this embodiment, so that the soldering point group 142 is aligned with the avoidance opening 122, thereby facilitating welding with the lead wire of the secondary coil module 13.

[0030] As a preferred embodiment, the shielding inner shell 12 is a metal shielding inner shell, and the shell 1 is a metal shell. Furthermore, an annular step portion 123 is provided between the recessed portion 120 and the edge of the shielding inner shell 12, an annular support portion 100 is formed on the inner edge of the shell 1, the annular step portion 123 abuts against the top of the annular support portion 100, and the edge of the shielding inner shell 12 contacts the inner wall of the shell 1. In the above structure, since the shielding inner shell 12 and the shell 1 are both made of metal, such as aluminum alloy, both have good thermal conductivity, based on the close abutment relationship between the annular step portion 123 and the annular support portion 100, and the contact relationship between the edge of the shielding inner shell 12 and the shell 1, the heat absorbed by the shielding inner shell 12 can be efficiently diffused to the shell 1, thereby improving the heat dissipation performance.

[0031] In this embodiment, an insulating sheet 124 is laid in the recessed portion 120 , and the insulating sheet 124 is used to play an insulating role between the electronic component 140 and the shielding inner shell 12 .

[0032] In order to enhance the magnetic attraction of the positioning magnetic ring assembly 11, the present embodiment includes a magnetic reinforcement ring 15, the positioning magnetic ring assembly 11 is attracted to the top surface of the magnetic reinforcement ring 15, and the bottom surface of the magnetic reinforcement ring 15 is bonded to the top edge of the circuit main board 14 by an annular foam 16. In the present embodiment, the magnetic reinforcement ring 15 can be an iron sheet ring, and the positioning magnetic ring assembly 11 is used to align and attract with the positioning magnetic ring built into the mobile phone or the positioning magnetic ring on the back shell of the mobile phone. Based on the coaxial positioning relationship between the two positioning magnetic rings, the main coil module 10 is aligned with the center of the coil built into the mobile phone to obtain maximum charging efficiency. In the present embodiment, the main coil module 10 is a Qi2 charging coil module, which has the advantages of higher wireless charging efficiency, faster speed, and better compatibility.

[0033] Combination Figure 3 , Figure 4 and Figure 7 As shown, the positioning magnetic ring assembly 11 includes a plurality of magnet units 110 , and the magnet unit 110 is a coplanar bipolar independent magnet 111 or a magnet group composed of two magnets 112 with opposite magnetic poles arranged in sequence along the radial direction.

[0034] In this example, see Figure 7 , the magnet unit 110 can be a coplanar bipolar independent magnet 111, which refers to bipolar magnetization of the same surface of a single magnet so that the same surface has both N and S poles. For equipment that can achieve this magnetization method, please refer to the Chinese patent publication number CN111799056B and the name "A coplanar bipolar magnetization device for magnetic bodies". In addition, in some alternative embodiments of the utility model, the magnet unit 110 can also be a magnet group composed of two magnets 112 with opposite magnetic poles arranged in sequence along the radial direction, that is, the same side of the two magnets 112 is N and S poles respectively. In actual applications, the two magnets 112 can be directly adsorbed to each other, or a non-magnetic area 113 can be set between the two magnets 112. Based on the above-mentioned various forms of magnet units 110, the inner and outer ring magnetic poles of the positioning magnetic ring assembly 11 are different. When the magnetic poles of the built-in magnetic ring of the mobile phone are in opposite directions, the positioning magnetic ring assembly 11 can be coaxially aligned with the built-in magnetic ring of the mobile phone, thereby ensuring high-efficiency charging.

[0035] In order to facilitate the connection of the power supply, in the present embodiment, a power interface board 17 is provided between the recessed portion 120 and the secondary coil module 13 , the leads of the power interface board 17 are welded to the welding point group 142 , and a power interface 170 is provided at the edge of the power interface board 17 .

[0036] As a preferred method, combined with Figure 3 and Figure 4The top surface of the housing 1 is provided with a top plate 18, and the top plate 18 covers the top of the main coil module 10 and the positioning magnetic ring assembly 11. A circular convex cover 19 is fixed to the back of the housing 1, and the secondary coil module 13 is arranged in the circular convex cover 19. On this basis, the top surface of the top plate 18 is attached with a reflective lens 102, and the reflective lens 102 is both decorative and practical. In addition, a central magnet 130 is preset at the center position of the secondary coil module 13, and the central magnet 130 is used for magnetic attraction with a smart watch.

[0037] Combination Figure 1 , Figure 2 , Figure 8 and Fig. 9 As shown, in this embodiment, a finger ring 2 is provided at the bottom of the shell 1, and the finger ring 2 surrounds the outer side of the circular convex cover 19. A first hinge 30 is provided at the edge of the finger ring 2, and a second hinge 31 is provided at the edge of the shell 1. The first hinge 30 and the second hinge 31 are hinge-connected by a damping shaft 32 passing through the two.

[0038] In the above structure, the finger ring 2 is connected to the shell 1 based on a damping hinge mechanism, which is composed of a first hinge 30, a second hinge 31 and a damping shaft 32 passing through the first hinge 30, a second hinge 31 and a damping shaft 32 passing through the first hinge 30, and based on the damping effect of the damping hinge mechanism, the finger ring 2 can be positioned at a corresponding angle after being flipped relative to the shell 1, thereby providing an oblique support for the shell 1. When the shell 1 is supported in an oblique posture, it is convenient for the user to observe the mobile phone screen and to adsorb the smart watch to the charging area on the back side of the shell 1, thereby charging the mobile phone and the smart watch at the same time. Of course, in actual applications, the finger ring 2 can also be flipped to fit the back of the shell 1, so that the finger ring 2 surrounds the outer side of the circular convex cover 19, and the smart watch and the mobile phone are adsorbed on both sides of the shell 1 at the same time, and the smart watch and the mobile phone are charged at the same time by stacking and adsorption, which better meets the application requirements of multiple scenarios.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the technical scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-sided magnetic wireless charger, characterized in that: The invention comprises a shell (1), wherein a main coil module (10), a positioning magnetic ring assembly (11), a shielding inner shell (12), a secondary coil module (13) and a circuit main board (14) with electronic components arranged on the back are arranged in the shell (1), wherein the main coil module (10) is arranged between the top surface of the circuit main board (14) and the top surface of the shell (1), the secondary coil module (13) is arranged between the back surface of the shielding inner shell (12) and the back surface of the shell (1), the positioning magnetic ring assembly (11) surrounds the outer side of the main coil module (10), the shielding inner shell (12) comprises a recessed portion (120) recessed toward the back surface, the circuit main board (14) covers the top surface of the shielding inner shell (12), and the electronic components on the back surface of the circuit main board (14) are accommodated in the recessed portion (120).

2. The double-sided magnetic wireless charger according to claim 1, characterized in that: An opening (141) is provided on the edge of the circuit main board (14), a main coil wire (101) is provided on the edge of the main coil module (10), the main coil wire (101) passes through the opening (141) and enters the recessed portion (120), and the main coil wire (101) is welded to the circuit main board (14).

3. The double-sided magnetic wireless charger according to claim 1, characterized in that: The recessed portion (120) is circular, an avoidance portion (121) is formed on the edge of the recessed portion (120), an avoidance opening (122) is provided on the avoidance portion (121), a soldering point group (142) is provided on the back side of the circuit main board (14), the soldering point group (142) is arranged in the avoidance opening (122), and the lead wires of the secondary coil module (13) are soldered to the soldering point group (142).

4. The double-sided magnetic wireless charger according to claim 1, characterized in that: The shielding inner shell (12) is a metal shielding inner shell, and the shell (1) is a metal shell.

5. The double-sided magnetic wireless charger according to claim 1, characterized in that: An annular step portion (123) is provided between the recessed portion (120) and the edge of the shielding inner shell (12); an annular support portion (100) is formed on the inner edge of the shell (1); the annular step portion (123) abuts against the top of the annular support portion (100); and the edge of the shielding inner shell (12) contacts the inner wall of the shell (1).

6. The double-sided magnetic wireless charger according to claim 1, characterized in that: It comprises a magnetic reinforcement ring (15), the positioning magnetic ring assembly (11) is attracted to the top surface of the magnetic reinforcement ring (15), and the bottom surface of the magnetic reinforcement ring (15) and the top surface edge of the circuit main board (14) are bonded via an annular foam (16).

7. The double-sided magnetic wireless charger according to claim 1, characterized in that: The positioning magnetic ring assembly (11) comprises a plurality of magnet units (110), wherein the magnet units (110) are coplanar bipolar independent magnets or magnet groups composed of two magnets (112) with opposite magnetic poles arranged in sequence along a radial direction.

8. The double-sided magnetic wireless charger according to claim 3, characterized in that: A power interface board (17) is provided between the recessed portion (120) and the secondary coil module (13); leads of the power interface board (17) are welded to the welding point group (142); and a power interface (170) is provided at the edge of the power interface board (17).

9. The double-sided magnetic wireless charger according to claim 1, characterized in that: The top surface of the shell (1) is provided with a top plate (18), and the top plate (18) covers the top of the main coil module (10) and the positioning magnetic ring assembly (11). The back of the shell (1) is fixed with a circular convex cover (19), and the secondary coil module (13) is arranged in the circular convex cover (19).

10. The double-sided magnetic wireless charger according to claim 9, characterized in that: A finger ring (2) is provided at the bottom of the shell (1), and the finger ring (2) surrounds the outer side of the circular convex cover (19). A first hinge (30) is provided at the edge of the finger ring (2), and a second hinge (31) is provided at the edge of the shell (1). The first hinge (30) and the second hinge (31) are hinge-connected by a damping shaft (32) passing through the first hinge (30) and the second hinge (31).

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