Permanent magnet module for wireless charging

Abstract

The utility model relates to the technical field of wireless charging, and particularly discloses a permanent magnet module for wireless charging, which comprises a magnet unit, and the magnet unit comprises a shielding shell and a magnetic body arranged on the shielding shell. The shielding shell is in an arc shape, the shielding shell is provided with an arc-shaped groove used for containing the magnetic body, the magnetic body is arranged in the arc-shaped groove in a surrounding mode, and magnetic induction lines generated by the magnetic body are gathered through the side wall of the arc-shaped groove and then act on an external component at an opening of the arc-shaped groove of the shielding shell. Through the magnetic field gathering effect and the design of the arc-shaped grooves, efficient adsorption and accurate positioning of the magnet units and external metal parts are achieved. The design of the avoiding gap and the sealing piece simplifies the assembly process, and improves the flexibility of the arrangement of the coil pins of the wireless charger.

Description

TECHNICAL FIELD

[0001] The utility model relates to wireless charging technical field especially discloses a kind of permanent magnet module of wireless charging. BACKGROUND

[0002] With the wide application of wireless charging technology, wireless charger based on electromagnetic induction and magnetic resonance coupling becomes mainstream. However, the traditional wireless charging device still has many deficiencies in the fixation and positioning of the magnet module. The coil design of the wireless charger needs to consider the convenience of circuit wiring and coil pin passing through the mounting structure, but the prior art does not provide a reasonable avoidance design, resulting in difficult assembly. SUMMARY

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a wireless charging magnet module that enhances the assembly convenience of the magnet module.

[0004] To achieve the above purpose, the utility model provides a kind of permanent magnet module of wireless charging, including magnet unit, and the magnet unit includes shielding shell and the magnetic body arranged on the shielding shell;The shielding shell is arranged in arc shape, and the shielding shell is provided with an arc-shaped groove for accommodating the magnetic body, and the magnetic body is arranged around the arc-shaped groove, and the magnetic induction lines generated by the magnetic body are gathered through the side wall of the arc-shaped groove and then act on the external components at the opening of the arc-shaped groove of the shielding shell.

[0005] Further, the magnet unit is provided with a first avoidance notch, and the first avoidance notch is used for the pin of the coil of the external wireless charger to pass through.

[0006] Further, the first avoidance notch is an open slot, and the open slot penetrates the magnet unit along the axial direction of the shielding shell.

[0007] Further, the first avoidance notch is a blind groove, and the blind groove does not penetrate the magnet unit along the axial direction of the shielding shell.

[0008] Further, the shielding shell has a bottom shell, an inner wall body and an outer wall body, the inner wall body and the outer wall body are respectively connected to the two sides of the bottom shell perpendicularly to form the arc-shaped groove, and the outer side of the connection between the inner wall body and the bottom shell and the outer side of the connection between the outer wall body and the bottom shell are both provided with an arc-shaped convex surface.

[0009] Further, the magnetic body is made of rare earth permanent magnet material, the number of magnetic bodies is multiple, the multiple magnetic bodies are arranged around the central axis of the arc-shaped groove, and the multiple magnetic bodies are arranged at intervals in the arc-shaped groove.

[0010] Further, the magnet unit further comprises a sealing piece, both ends of the sealing piece are provided with guide strips, the shielding shell is provided with guide sliding grooves for accommodating the guide strips at the avoiding notches, the sealing piece is matched and installed with the shielding shell through the sliding fit of the guide strips and the guide sliding grooves, the sealing piece is provided with a second avoiding notch for the pins of the external coil to pass through, and the first avoiding notch and the second avoiding notch are communicated with each other.

[0011] Further, the sealing piece is made of non-magnetic material such as silica gel, so that the pins of the coil are protected without affecting the magnetic induction lines of the magnetic body, and the assembly convenience is improved.

[0012] Further, the wireless charging permanent magnet module further comprises a connecting unit used in cooperation with the magnet unit, the connecting unit comprises a first adhesive layer and a second adhesive layer, the first adhesive layer and the second adhesive layer are arranged on two sides of the magnet unit respectively, and the magnet unit is matched and installed with the shell of the external wireless charger through the connecting unit.

[0013] Further, a release paper unit used in cooperation with the connecting unit is further included, the release paper unit comprises a first release film attached to the adhesive surface of the first adhesive layer and a second release film attached to the adhesive surface of the second adhesive layer.

[0014] Further, the outer surface of the magnetic body is plated with a corrosion-resistant plating layer, and the outer surface of the corrosion-resistant plating layer is coated with a nano-hydrophobic layer.

[0015] Further, the corrosion-resistant plating layer is plated on the outer surface of the magnetic body by electroplating, and the corrosion-resistant plating layer is a nickel-copper composite plating layer.

[0016] The permanent magnet module of the utility model realizes the precise positioning of the wireless charging device by the arrangement of the magnetic body in the arc-shaped groove, the magnetic induction line gathering effect generated by the magnetic body, the stable adsorption of the magnet unit on the surface of the external metal part and the like. Meanwhile, the avoiding notch provides convenience for the arrangement of the pins of the wireless charging coil, and the sliding assembly of the sealing piece and the fixing function of the adhesive layer simplify the installation process of the module.

[0017] The utility model discloses the beneficial effect: through magnetic field gathering effect and arc-shaped groove design, realize the efficient adsorption and accurate positioning of magnet unit and external metal part. The avoiding notch and the sealing piece design simplify the assembly process, improve the flexibility of the coil pin arrangement of the wireless charger. The design of rare earth permanent magnetic material and interval arrangement of magnetic body effectively improves the magnetic field intensity and magnetic effect, improves the wireless charging efficiency. The arc-shaped convex surface design enhances the durability of the module, avoids damage caused by stress concentration. The design of adhesive layer and release paper unit facilitates the adaptation of the module to different equipment, and has good versatility. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Structure diagram of combined state of permanent magnet module;

[0019] Figure 2 Structure diagram of exploded state of permanent magnet module;

[0020] Figure 3 Structure diagram of Figure 2 Enlarged structure diagram of A part in the middle;

[0021] Figure 4 Structure diagram of magnet unit of the utility model;

[0022] Figure 5 Structure diagram of the utility model after partial section;

[0023] Figure 6 Sectional view of the utility model.

[0024] Reference signs include:

[0025] 1, magnet unit; 2, connecting unit; 3, release paper unit; 11, shielding shell; 111, bottom shell; 112, inner wall body; 113, outer wall body; 12, magnetic body; 121, anticorrosion plating layer; 122, nanometer hydrophobic layer; 13, arc-shaped recess; 14, first avoiding notch; 141, guide chute; 15, sealing piece; 151, guide strip; 152, second avoiding notch; 21, first adhesive layer; 22, second adhesive layer; 31, first release film; 32, second release film; 321, tear strip; 30, positioning hole. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of those skilled in the art, the utility model will be further described below in conjunction with examples and drawings, and the content mentioned in the implementation manner is not a limitation on the utility model.

[0027] Please refer to Figures 1 to 6 The utility model discloses a wireless charging and using permanent magnet module, including magnet unit 1, magnet unit 1 includes shielding shell 11 and sets up on shielding shell 11 magnetic body 12, shielding shell 11 is arc-shaped, shielding shell 11 is set up with the arc-shaped recess 13 for containing magnetic body 12, magnetic body 12 is set up in the arc-shaped recess 13 around, and the magnetic induction line generated by magnetic body 12 is gathered after shielding shell 11 arc-shaped recess 13's lateral wall and acts on the external component on the opening of shielding shell 11 arc-shaped recess 13.According to the size of component, such as smart phone, smart watch, can design the shielding shell 11 and magnetic body 12 of corresponding size.

[0028] Specifically, the shielding shell 11 has a bottom shell 111, an inner wall body 112 and an outer wall body 113, and the inner wall body 112 and the outer wall body 113 are respectively connected to the two sides of the bottom shell 111 to form an arc-shaped groove 13. The shielding shell 11 is made of a magnetic conductive material and is integrally formed. While ensuring that the magnetic force lines of the magnetic body 12 in the arc-shaped groove 13 are as little as possible to leak, the structural strength is increased, and the installation stability is improved. The outer side of the connection between the inner wall body 112 and the bottom shell 111, and the outer side of the connection between the outer wall body 113 and the bottom shell 111 are provided with an arc-shaped outer convex surface (i.e. the shielding shell 11 is provided with a round corner on the outer side), which can enhance the mechanical strength of the shielding shell 11, avoid the magnetic body 12 from loosening due to external force impact, and additionally, since the first adhesive layer 21 and the second adhesive layer 22 are distributed and attached to the magnetic body 12 and the back of the shell, if the arc-shaped outer convex surface is not provided, it may cause assembly error, and after the arc-shaped outer convex surface is provided, it is convenient for the subsequent process to be quickly installed and positioned.

[0029] Specifically, the shielding shell 11 is provided with a first avoiding gap 14 penetrating in the axial direction, which facilitates the coil pin of the external wireless charger to pass through. In the embodiment, the first avoiding gap 14 is a through slot, that is, the first avoiding gap 14 completely penetrates the magnet unit 1, and the sealing element 15 is made of silica gel material, and the two ends of the sealing element 15 are provided with guide strips 151 which are slidingly fitted with the guide sliding grooves 141 of the shielding shell 11 at the avoiding gap, to ensure that the sealing element 15 is firmly installed. The sealing element 15 is also provided with a second avoiding gap 152 which is communicated with the first avoiding gap 14 of the shielding shell 11, and when installed and positioned, the pin of the external coil can pass out from the second avoiding gap 152 and be electrically connected with the control circuit board of the wireless charger, to avoid the pin from being damaged due to friction or pulling.

[0030] In another preferred embodiment, the first avoiding gap 14 is a blind slot which does not completely penetrate the magnet unit 1, that is, the shielding shell 11 is a closed ring structure, and the first avoiding gap 14 is formed by not arranging the magnetic body 12 at a certain position in the arc-shaped groove 13 of the shielding shell 11, for the pin of the coil to pass through.

[0031] Specifically, the connecting unit 2 includes a first adhesive layer 21 and a second adhesive layer 22 which are respectively arranged on the two sides of the magnet unit 1 and are installed in cooperation with the shell of the external wireless charger through the adhesive layer. The release paper unit 3 includes a first release film 31 and a second release film 32 which are attached to the surface of the adhesive layer, and the release film can be easily torn off to activate the adhesion of the adhesive layer when in use. The magnetic body 12 and the shielding shell 11 are integrated into the magnet unit 1, which is arranged in the shell of the external wireless charger through the connecting unit 2. This modular design facilitates the later maintenance and upgrading of the magnet unit 1, prolongs the overall service life of the equipment, and reduces the maintenance cost.

[0032] Specifically, the first release film 31 and the second release film 32 are both provided with positioning holes 30, so that the entire magnet module (the magnet unit 1, the connecting unit 2 and the release paper unit 3) can be stably positioned in a matching packaging box in the process of packaging and transportation. The packaging box is provided with positioning columns which are inserted into the positioning holes 30.

[0033] Specifically, the covering area of the first release film 31 is larger than that of the entire shielding shell 11, and the second release film 32 includes an annular part matched with the shape of the second adhesive layer 22 and a tear strip 321 protruding from the annular part. In the actual installation process, the tear-off convenience of the release film is increased.

[0034] In actual application, the magnetic induction lines generated by the magnetic bodies 12 are gathered via the sidewalls of the arc-shaped groove 13, and then the magnetic gathering effect is generated on one side of the shielding shell 11, so that the magnet unit 1 and the external metal part are quickly adsorbed and accurately positioned. When the pin of the external wireless charger coil passes through the first avoiding gap 14, the second avoiding gap 152 of the sealing piece 15 can provide additional protection.

[0035] In actual installation, the operator first tears off the first release film 31 to expose the high-adhesion surface of the first adhesive layer 21, and then installs the magnet unit 1 into the shell of the wireless charger, and then installs the coil and the circuit control board into the shell, so that the coil is located in the space formed by the annular shielding shell 11. In this process, the pin of the coil is naturally placed into the first avoiding gap 14, and then the sealing piece 15 is installed into the first avoiding gap 14, and finally the circuit control board and the coil are fixed by using glue. At this time, the magnetic gathering effect of the magnet unit 1 can ensure that the device is firmly adsorbed and prevents falling off. At the same time, the sealing piece 15 also protects the connection stability of the coil pin and the circuit control board. If the magnet unit 1 or the sealing piece 15 needs to be replaced, the device can be easily disassembled by sliding the sealing piece 15 or removing the adhesive layer of the connecting unit 2, which greatly improves the maintenance convenience.

[0036] Specifically, the magnetic bodies 12 are made of neodymium-iron-boron material, and the number of the magnetic bodies 12 is multiple. The multiple magnetic bodies 12 are arranged around the central axis of the arc-shaped groove 13 and are spaced apart in the arc-shaped groove 13. The bottom of the arc-shaped groove 13 of the shielding shell 11 is provided with multiple magnetic isolation supports, and adjacent two magnetic bodies 12 are isolated from each other by the magnetic isolation supports. The magnetic bodies 12 are installed in the arc-shaped groove 13 by smearing glue or are installed in the arc-shaped groove 13 by setting a clamping structure.

[0037] Specifically, the surface of the magnetic body 12 is sequentially provided with a nickel-copper composite plating layer and a nano-hydrophobic layer 122. The nickel-copper composite plating layer is plated by electroplating, which provides excellent corrosion resistance; and the nano-hydrophobic layer 122 enhances the water resistance and prevents moisture from entering. This multi-layer protection structure effectively prolongs the service life of the magnetic body 12.

[0038] Through the innovative design of the above structure and material, the corrosion resistance and service life of the magnetic body 12 are significantly improved. The magnetic aggregation design of the arc-shaped groove 13 enhances the adsorption force of the magnet unit 1, ensuring its stable positioning. The design of the relief gap and the sealing element 15 improves the protection and assembly efficiency of the coil pin. The application of the adhesive layer and the release paper makes the installation process more convenient and suitable for various application scenarios.

[0039] The above is only a preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, the specific implementation and application range will be changed, and the content of the specification should not be understood as limiting the present application.

Claims

1. A permanent magnet module for wireless charging, characterized in that: The magnet unit (1) comprises a shielding shell (11) and a magnetic body (12) arranged on the shielding shell (11); the shielding shell (11) is arc-shaped, and the shielding shell (11) is provided with an arc-shaped groove (13) for accommodating the magnetic body (12); the magnetic body (12) is arranged around the arc-shaped groove (13); and magnetic induction lines generated by the magnetic body (12) are gathered through the sidewall of the arc-shaped groove (13) and then act on external components at the opening of the arc-shaped groove (13) of the shielding shell (11).

2. The wireless charging and using permanent magnet module according to claim 1, wherein: The magnet unit (1) is provided with a first avoiding gap (14) between the two ends of the shielding shell (11), and the first avoiding gap (14) is used for allowing the pin of the coil of the external wireless charger to pass through.

3. The wireless charging and using permanent magnet module according to claim 2, characterized in that: The first avoiding gap (14) is an open slot, and the open slot penetrates the magnet unit (1) along the axial direction of the shielding shell (11).

4. The wireless charging and using permanent magnet module of claim 2, wherein: The first avoiding gap (14) is a blind slot, and the blind slot does not penetrate the magnet unit (1) along the axial direction of the shielding shell (11).

5. The wireless charging and using permanent magnet module of claim 1, wherein: The shielding shell (11) has a bottom shell (111), an inner wall body (112) and an outer wall body (113), the inner wall body (112) and the outer wall body (113) are respectively connected to the two sides of the bottom shell (111) to form the arc-shaped groove (13), and the outer side of the connection between the inner wall body (112) and the bottom shell (111) and the outer side of the connection between the outer wall body (113) and the bottom shell (111) are provided with arc-shaped outer convex surfaces.

6. The wireless charging and using permanent magnet module of claim 1, wherein: The magnetic body (12) is made of a rare earth permanent magnet material, and the plurality of magnetic bodies (12) are arranged around the central axis of the arc-shaped groove (13) and are arranged at intervals in the arc-shaped groove (13).

7. The wireless charging and using permanent magnet module of claim 2, wherein: The magnet unit (1) further comprises a sealing piece (15), the two ends of the sealing piece (15) are provided with guide strips (151), the first avoiding gap (14) of the shielding shell (11) is provided with a guide sliding groove (141) for accommodating the guide strips (151), the sealing piece (15) is installed in cooperation with the shielding shell (11) by means of the sliding cooperation of the guide strips (151) and the guide sliding groove (141), the sealing piece (15) is provided with a second avoiding gap (152) in communication with the first avoiding gap (14), and the pin of the coil of the external wireless charger is connected with an external control circuit board through the second avoiding gap (152).

8. The wireless charging and using permanent magnet module of claim 1, wherein: The wireless charging permanent magnet module further comprises a connecting unit (2) used in cooperation with the magnet unit (1), the connecting unit (2) comprises a first adhesive layer (21) and a second adhesive layer (22), the first adhesive layer (21) and the second adhesive layer (22) are arranged on the two sides of the magnet unit (1), respectively, and the magnet unit (1) is installed in cooperation with the shell of the external wireless charger through the connecting unit (2).

9. The wireless charging module of claim 8, wherein: The application further comprises a release paper unit (3) used in cooperation with the connecting unit (2), wherein the release paper unit (3) comprises a first release film (31) attached to the adhesive surface of the first adhesive layer (21) and a second release film (32) attached to the adhesive surface of the second adhesive layer (22).

10. The wireless charging and using permanent magnet module of claim 1, wherein: The outer surface of the magnetic body (12) is plated with a corrosion-resistant plating layer (121), and the outer surface of the corrosion-resistant plating layer (121) is coated with a nano-hydrophobic layer (122).

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