Desktop wireless charger

Abstract

The invention relates to the related technical field of chargers, and discloses a desktop wireless charger which comprises a charging shell, a magnetic assembly and a charging module, the magnetic assembly comprises open-ring-shaped back iron, magnetic steel and induction magnetic steel, the magnetic steel and the induction magnetic steel are arranged on the back iron, and the induction magnetic steel is of a three-layer structure and comprises a magnetic steel body, a double-faced adhesive tape and a transparent film; the double faced adhesive tape is located between the magnetic steel body and the transparent film and bonds the magnetic steel body and the transparent film, the magnetic steel and the induction magnetic steel are arc-shaped sheet bodies, the back iron is provided with an open annular groove, the plurality of magnetic steels are embedded in the open annular groove, the plurality of magnetic steels are connected end to end to form an open ring shape, and the induction magnetic steel is arranged at a notch of the open ring to form a complete circular ring. The magnetic steel body of the induction magnetic steel is tightly attached to the back iron, so that one side of the transparent film on the induction magnetic steel is exposed, through improvement of the induction magnetic steel, the fixing effect on the magnetic steel body is enhanced, the surface of the magnetic steel body is protected, and the service life is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field related to chargers, and more specifically, particularly relates to a desktop wireless charger. Background Art

[0002] With the rapid development of wireless charging technology, desktop wireless chargers have gradually become one of the mainstream ways to charge electronic devices due to their convenience and efficiency. Wireless chargers, based on the principle of electromagnetic induction, eliminate the need for physical connections, greatly enhancing the user experience. However, existing wireless chargers still have some technical problems in practical applications, which affect their charging efficiency and stability.

[0003] The inventor has found that the prior art still has the following technical problems: The magnetic force component design of traditional wireless chargers is relatively simple, and the magnetic field distribution is uneven, resulting in low charging efficiency. Especially when multiple devices are charged simultaneously, the magnetic field interference phenomenon is obvious, further reducing the charging stability and efficiency. Secondly, the fixing method of the magnetic steel in the magnetic force component is not firm enough, and it is easy to fall off or be damaged due to long-term use or external impact, affecting the service life of the charger. In addition, the protection measures on the surface of the magnetic steel are insufficient, and it is easy to be corroded and worn, further shortening the service life of the magnetic steel.

[0004] To solve the above problems, some improvement schemes have been proposed in the prior art, such as increasing the number of magnetic steels and optimizing the arrangement of magnetic steels. However, these schemes often increase the thickness and volume of the charger, which is not conducive to the portability and aesthetics of the device. At the same time, the fixing and protection problems of the magnetic steel have not been effectively solved, resulting in the overall reliability and service life of the charger not meeting the user's requirements.

[0005] Therefore, there is an urgent need for a new type of desktop wireless charger that can solve the problems of magnetic steel fixing and protection while ensuring charging efficiency and stability, extend the service life of the charger, and reduce the overall thickness of the device to improve portability and aesthetics.

[0006] Therefore, in view of the existing structure, research and improvement are carried out to provide a desktop wireless charger, with the expectation of achieving a more practical value. Summary of the Invention

[0007] The present invention provides a desktop wireless charger to overcome the above defects in the prior art.

[0008] The purpose and efficacy of a desktop wireless charger of the present invention are achieved by the following specific technical means: The present invention provides a desktop wireless charger, which includes a charging housing, a magnetic assembly, and a charging module. The magnetic assembly is installed on the inner wall of the charging housing, and the charging module is arranged in the annular groove of the magnetic assembly. The magnetic assembly includes an open-ring-shaped back iron, a magnet, and an induction magnet arranged on the back iron. The induction magnet has a three-layer structure, namely a magnet body, a double-sided adhesive, and a transparent film. The double-sided adhesive is between the magnet body and the transparent film and bonds the magnet body and the transparent film. Both the magnet and the induction magnet are arc-shaped sheets. The back iron has an open-ring-shaped groove, and several magnets are embedded in the open-ring-shaped groove, and several magnets are connected end to end to form an open-ring shape. The induction magnet is arranged at the notch of the open ring to form a complete ring. The magnet body of the induction magnet is closely attached to the back iron, so that one side of the transparent film on the induction magnet is exposed.

[0009] In a further technical solution, the depth of the open-ring-shaped groove is greater than or equal to the thickness of the magnet, the upper surface of the magnet does not protrude from the upper surface of the back iron, the total thickness of the three-layer structure of the induction magnet is equal to the depth of the back iron at the notch, the upper surface of the induction magnet is flush with the upper surface of the back iron, and the lower surface of the induction magnet is flush with the lower surface of the back iron.

[0010] In a further technical solution, the thickness of the magnet is 0.35 mm, the depth of the open-ring groove is 0.4 mm, the depth of the notch of the open-ring groove is 0.9 mm, and the total thickness of the three-layer structure of the induction magnet is 0.9 mm.

[0011] In a further technical solution, the magnetization directions of both the magnet and the induction magnet are radial.

[0012] In a further technical solution, the back iron is made of a hot-dip galvanized sheet. The base material of the hot-dip galvanized sheet is a 0.5-mm steel plate, and the surface of the steel plate is subjected to hot-dip galvanizing treatment to form a uniform zinc layer. The thickness of the zinc layer is 5 μm to 30 μm.

[0013] In a further technical solution, the surfaces of both the magnet and the magnet body of the induction magnet are treated with an NiCuNi coating, and the thickness of the NiCuNi coating is not less than 12 microns.

[0014] In a further technical solution, the outer ring edge of the back iron has an outer ring magnetic resistance sheet, and the inner ring edge of the back iron has an inner ring magnetic resistance sheet. The outer ring magnetic resistance sheet and the inner ring magnetic resistance sheet enclose an annular groove for gathering magnetic fields. Both the inner ring magnetic resistance sheet and the outer ring magnetic resistance sheet have a notch, and the two notches are aligned. The induction magnet is arranged at the notch so that the induction magnet is not blocked by the inner ring magnetic resistance sheet and the outer ring magnetic resistance sheet.

[0015] Further technical solution: The charging housing has a back plate, on which an annular back adhesive is bonded, and the back iron is bonded to the annular back adhesive.

[0016] Further technical solution: The surface of the back iron is also bonded with a special-shaped back adhesive, and the special-shaped back adhesive includes an annular double-sided adhesive and two connecting ears, and both connecting ears extend radially outward from the center of the annular double-sided adhesive.

[0017] Further technical solution: The magnet has two magnetic poles, the outer arc of the magnet is the S pole, and the inner arc is the N pole, or the outer arc of the magnet is the N pole, and the inner arc is the S pole.

[0018] Compared with the prior art, the present invention has the following beneficial effects: A desktop wireless charger of the present invention improves the magnetic force assembly. The magnetic force assembly includes a number of magnets connected end to end to form an open loop, and an induction magnet is arranged at the notch of the open loop. The induction magnet has a three-layer structure, namely a magnet body, a double-sided adhesive, and a transparent film. The double-sided adhesive is between the magnet body and the transparent film and bonds the magnet body and the transparent film. This not only enhances the fixing effect on the magnet body, but also protects the surface of the magnet body, extends the service life, and the depth of the open annular groove matches the thickness of the induction magnet, ensuring that the magnet and the induction magnet are flush with the surface of the back iron, avoiding the problem of uneven magnetic field caused by protrusions or depressions, and further improving the stability and efficiency of wireless charging. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] The present invention will be further described below in conjunction with the drawings and embodiments.

[0021] Figure 1 It is a schematic structural view of the back iron of the present invention; Figure 2 It is a schematic structural view of the magnet and the induction magnet in the present invention; Figure 3 It is a schematic structural view of the magnet in the present invention; Figure 4 It is a schematic view of the magnetizing direction of the magnet in the present invention; Figure 5 It is a schematic three-layer structural view of the induction magnet in the present invention; Figure 6It is a schematic structural diagram of the backplane and the annular back adhesive in the present invention; Figure 7 It is a schematic structural diagram of the backplane and the special-shaped back adhesive in the present invention.

[0022] Explanation of reference numerals: Back iron 10; Magnet 11; Inductive magnet 12; Magnet body 13; Double-sided adhesive 14; Transparent film 15; Annular back adhesive 16; Backplane 18; Annular double-sided adhesive 19; Connecting ear 20. Detailed implementation manners

[0023] The following further describes the implementation manners of the present invention in detail with reference to the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0024] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] Refer to the attached Figures 1 - 7, the present invention provides a desktop wireless charger, which includes a charging housing, a magnetic component, and a charging module. The magnetic component is installed on the inner wall of the charging housing, and the charging module is disposed in the annular groove of the magnetic component. The magnetic component includes an open-ring-shaped back iron 10, a magnet 11, and an induction magnet 12 disposed on the back iron 10. The induction magnet 12 has a three-layer structure, namely a magnet body 13, a double-sided adhesive 14, and a transparent film 15. The double-sided adhesive 14 is between the magnet body 13 and the transparent film 15 and bonds the magnet body 13 and the transparent film 15. Both the magnet 11 and the induction magnet 12 are arc-shaped sheets. The back iron 10 has an open-ring-shaped groove, and several magnets 11 are embedded in the open-ring-shaped groove, and several magnets 11 are connected end to end to form an open-ring shape. The induction magnet 12 is disposed at the notch of the open ring to form a complete ring. The magnet body 13 of the induction magnet 12 is in close contact with the back iron 10, so that one side of the transparent film 15 on the induction magnet 12 is exposed.

[0027] In this embodiment, by setting the magnet 11 and the induction magnet 12 as arc-shaped sheets and embedding them in the open-ring-shaped groove of the back iron 10, the uniformity and stability of the magnetic field can be effectively enhanced, the wireless charging efficiency can be improved. The three-layer structure design of the induction magnet 12, namely the magnet body 13, the double-sided adhesive 14, and the transparent film 15, not only enhances the fixing effect on the magnet body 13, but also protects the surface of the magnet body 13 and extends the service life.

[0028] Preferably, the depth of the open-ring-shaped groove is greater than or equal to the thickness of the magnet 11, the upper surface of the magnet 11 does not protrude from the upper surface of the back iron 10, the total thickness of the three-layer structure of the induction magnet 12 is equal to the depth of the back iron 10 at the notch, the upper surface of the induction magnet 12 is flush with the upper surface of the back iron 10, and the lower surface of the induction magnet 12 is flush with the lower surface of the back iron 10.

[0029] In this embodiment, the depth of the open-ring-shaped groove matches the thickness of the induction magnet 12, ensuring that the magnet 11 and the induction magnet 12 are flush with the surface of the back iron 10, avoiding the problem of uneven magnetic field caused by protrusion or depression, and further improving the stability and efficiency of wireless charging.

[0030] Specifically, the thicknesses of the magnet 11 and the induction magnet 12 are specifically set as follows: the thickness of the magnet 11 is 0.35 mm, the depth of the open-ring groove is 0.4 mm, the depth of the notch of the open-ring groove is 0.9 mm, and the total thickness of the three-layer structure of the induction magnet 12 is 0.9 mm. The above design makes the overall thickness of the magnetic component controlled within 0.9 mm, which is very thin, reducing the occupied thickness and being beneficial to reducing the overall thickness of the desktop wireless charger.

[0031] In other embodiments of the present application, the lower surface of the magnet 11 is adhesively bonded to the bottom surface of the open annular groove through a colloid. Due to the existence of the colloid thickness, the upper surface of the magnet 11 is flush with the upper surface of the back iron 10, or the upper surface of the magnet 11 protrudes from the upper surface of the back iron 10, and the protruding height does not exceed 0.05 mm.

[0032] In some embodiments, the width of the induction magnet 12 is greater than the width of the magnet 11. Specifically, the width of the induction magnet 12 is set to 4.05 mm, and the width of the magnet 11 is set to 3.55 mm.

[0033] Preferably, the magnetization directions of the magnet 11 and the induction magnet 12 are both radial.

[0034] Specifically, the magnetization directions of the magnet 11 and the induction magnet 12 are Figure 4 in the direction from S to N as shown.

[0035] Preferably, the back iron 10 is made of a hot-dip galvanized sheet. The base material of the hot-dip galvanized sheet is a steel sheet with a thickness of 0.5 mm. The surface of the steel sheet is subjected to hot-dip galvanizing treatment to form a uniform zinc layer, and the thickness of the zinc layer is 5 μm to 30 μm.

[0036] In this embodiment, the hot-dip galvanized sheet has good corrosion resistance, which can effectively extend the service life of the back iron 10. At the same time, the uniformity of the zinc layer ensures the mechanical strength and magnetic field conduction performance of the back iron 10, improving the overall reliability of the wireless charger.

[0037] Preferably, the surfaces of the magnet bodies 13 of the magnet 11 and the induction magnet 12 are both treated with a NiCuNi coating, and the thickness of the NiCuNi coating is not less than 12 microns.

[0038] In this embodiment, the NiCuNi coating treatment enhances the corrosion resistance and wear resistance of the magnet, extends the service life of the magnet. At the same time, the uniformity of the coating ensures the stability of the magnetic field, improving the efficiency of wireless charging.

[0039] Preferably, the outer ring edge of the back iron 10 has an outer ring magnetic resistance sheet, and the inner ring edge of the back iron 10 has an inner ring magnetic resistance sheet. The outer ring magnetic resistance sheet and the inner ring magnetic resistance sheet enclose an annular groove for concentrating the magnetic field. Both the inner ring magnetic resistance sheet and the outer ring magnetic resistance sheet have a notch, and the two notches are aligned. The induction magnet 12 is arranged at the notch so that the induction magnet 12 is not blocked by the inner ring magnetic resistance sheet and the outer ring magnetic resistance sheet.

[0040] In this embodiment, by providing an outer magnetic shielding sheet and an inner magnetic shielding sheet, the magnetic field can be effectively concentrated, magnetic field leakage can be reduced, and the efficiency of wireless charging can be improved. At the same time, the notch design ensures that the magnetic field of the induction magnet 12 is not blocked by the magnetic shielding sheet, and the induction magnet 12 can effectively detect the change of the magnetic field.

[0041] Preferably, the charging housing has a back plate 18, and an annular adhesive 16 is adhered to the back plate 18, and the back iron 10 is adhered to the annular adhesive 16.

[0042] Preferably, a special-shaped adhesive is further adhered to the surface of the back iron 10. The special-shaped adhesive includes an annular double-sided adhesive 19 and two connecting ears 20, and both connecting ears 20 radially extend outward from the center of the annular double-sided adhesive 19.

[0043] Preferably, the magnet 11 has two magnetic poles, the outer arc of the magnet 11 is an S pole, and the inner arc is an N pole, or the outer arc of the magnet 11 is an N pole, and the inner arc is an S pole.

[0044] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A desktop wireless charger, comprising a charging housing, a magnetic component and a charging module. The magnetic component is installed on the inner wall of the charging housing, and the charging module is arranged in the annular groove of the magnetic component, characterized in that The magnetic component includes an open-ring-shaped back iron, a magnet, and an induction magnet disposed on the back iron. The induction magnet has a three-layer structure, namely a magnet body, a double-sided adhesive, and a transparent film. The double-sided adhesive is between the magnet body and the transparent film and bonds the magnet body and the transparent film. Both the magnet and the induction magnet are arc-shaped sheets. The back iron has an open-ring-shaped groove, and several of the magnets are embedded in the open-ring-shaped groove, and several of the magnets are connected end to end to form an open-ring shape. The induction magnet is disposed at the notch of the open ring to form a complete ring. The magnet body of the induction magnet is in close contact with the back iron, so that one side of the transparent film on the induction magnet is exposed.

2. The desktop wireless charger according to claim 1, characterized in that: The depth of the open-ring-shaped groove is greater than or equal to the thickness of the magnet. The upper surface of the magnet does not protrude from the upper surface of the back iron. The total thickness of the three-layer structure of the induction magnet is equal to the depth of the back iron at the notch. The upper surface of the induction magnet is flush with the upper surface of the back iron, and the lower surface of the induction magnet is flush with the lower surface of the back iron.

3. The desktop wireless charger according to claim 2, wherein: The thickness of the magnet is 0.35 mm, the depth of the open-ring groove is 0.4 mm, the depth of the notch of the open-ring groove is 0.9 mm, and the total thickness of the three-layer structure of the induction magnet is 0.9 mm.

4. The desktop wireless charger according to claim 1, wherein: The magnetization directions of both the magnet and the induction magnet are radial.

5. The desktop wireless charger according to claim 1, characterized in that: The back iron is made of a hot-dip galvanized sheet. The base material of the hot-dip galvanized sheet is a 0.5-mm steel plate. The surface of the steel plate is subjected to hot-dip galvanizing treatment to form a uniform zinc layer, and the thickness of the zinc layer is 5 μm to 30 μm.

6. The desktop wireless charger according to claim 1, wherein: The surfaces of both the magnet and the magnet body of the induction magnet are treated with a NiCuNi coating, and the thickness of the NiCuNi coating is not less than 12 microns.

7. A desktop wireless charger according to claim 1, characterized in that: The outer ring edge of the back iron has an outer ring magnetic resistance sheet, and the inner ring edge of the back iron has an inner ring magnetic resistance sheet. The outer ring magnetic resistance sheet and the inner ring magnetic resistance sheet enclose a ring-shaped groove for concentrating the magnetic field. Both the inner ring magnetic resistance sheet and the outer ring magnetic resistance sheet have a notch, and the two notches are aligned. The induction magnet is disposed at the notch so that the induction magnet is not blocked by the inner ring magnetic resistance sheet and the outer ring magnetic resistance sheet.

8. A desktop wireless charger according to any one of claims 1, characterized in that, The charging housing has a back plate, and a ring-shaped back adhesive is bonded to the back plate. The back iron is bonded to the ring-shaped back adhesive.

9. The desktop wireless charger according to claim 8, characterized in that, An irregular back adhesive is also bonded to the surface of the back iron. The irregular back adhesive includes a ring-shaped double-sided adhesive and two connecting ears with different shapes. Both connecting ears extend radially outward from the center of the ring-shaped double-sided adhesive.

10. A desktop wireless charger according to claim 1, characterized in that, The magnet has two magnetic poles. The outer arc of the magnet is the S pole and the inner arc is the N pole, or the outer arc of the magnet is the N pole and the inner arc is the S pole.

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