CN213661280U - Wireless auxiliary device that charges, wireless electric energy transmission external member and furniture - Google Patents

Abstract

The embodiment of the utility model discloses wireless auxiliary device, wireless electric energy transmission external member and furniture that charge. The embodiment of the utility model provides a through setting up one and surround or partially surround the magnetic sheet with the regional that electric energy receiving coil size corresponds, further stack ferromagnetic metal piece that a shape at least partially covers the magnetic sheet on the magnetic sheet, the magnetic adsorption through magnetic sheet and ferromagnetic metal piece sets up the magnet device around electric energy receiving coil, therefore, ferromagnetic metal piece can strengthen the adsorption affinity effectively, realize the accurate location of wireless power transmitting terminal and wireless power receiving terminal, and simultaneously, can reduce the vortex because alternating magnetic field leads to through the magnetic sheet, reduce the unnecessary loss.

Description

Wireless auxiliary device that charges, wireless electric energy transmission external member and furniture

Technical Field

The utility model relates to a power electronic technology field, concretely relates to wireless auxiliary device, wireless power transmission external member and the application of charging the furniture of device.

Background

With the development of power electronic technology, wireless charging modules are increasingly miniaturized, which enables more and more portable devices, such as smart phones, to be loaded with wireless charging modules. This allows the user to conveniently charge the portable device in a non-contact manner.

In a typical wireless charging system, a wireless power transmitting terminal has one or more power transmitting coils, and a wireless power receiving terminal generally has a power receiving coil. Only when the power receiving coil is well coupled with the wireless power transmitting coil, the wireless charging system can obtain ideal charging efficiency. And under the condition that the electric energy receiving coil and the electric energy transmitting coil are aligned with each other, the electric energy receiving coil and the electric energy transmitting coil can obtain better coupling. However, since the power transmitting coil and the power receiving coil are usually accommodated in the housing of the device, how to conveniently align the user with the wireless power transmitting end and the wireless power receiving end is a problem to be solved.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a wireless auxiliary device that charges, wireless power transmission external member and furniture to solve the problem of wireless power transmitting terminal and the mutual alignment location of wireless power receiving terminal.

In a first aspect, an embodiment of the utility model provides a wireless auxiliary device that charges for supplementary wireless power receiving terminal and wireless power transmitting terminal mutual positioning, the wireless auxiliary device that charges includes:

at least one magnetic sheet disposed around a center so as to completely or partially surround an area having a size greater than or equal to a size of a power receiving coil of the wireless power receiving terminal, wherein the magnetic sheet has magnetism; and

at least one ferromagnetic metal sheet overlying the magnetic sheet.

Preferably, the overall shape of the at least one magnetic sheet is the same as or similar to the shape of the positioning magnet disposed in the wireless power receiving terminal.

Preferably, the wireless charging assist apparatus further includes:

at least one fixing member disposed on a back surface of the magnetic sheet to fix the magnetic sheet to a charging surface.

Preferably, the wireless charging assist apparatus further includes:

at least one decorative layer disposed on the ferromagnetic metal sheet such that a surface of the wireless charging accessory has a different color and/or texture than the charging surface.

Preferably, the at least one magnetic sheet is an annular magnetic sheet surrounding the circular region; or

The at least one magnetic sheet is a plurality of magnetic sheets which are arranged at intervals to surround the area; or

The at least one magnetic sheet is a fan-shaped magnetic sheet partially surrounding the circular area; or

The at least one magnetic sheet is a plurality of annular magnetic sheets concentrically arranged around the center of the area, and gaps are formed in the annular magnetic sheets along the radial direction; or

At least one magnetic sheet includes a plurality of magnetic sheet groups, and every magnetic sheet group includes a plurality of edges the magnetic sheet that regional circumference set up, different magnetic sheet group edge regional nested setting, different magnetic sheets in the magnetic sheet group set up along circumference interval.

Preferably, the at least one ferromagnetic metal sheet and the at least one magnetic sheet are arranged in one-to-one correspondence and have the same shape.

Preferably, the ferromagnetic metal pieces have a size smaller than the corresponding magnetic pieces.

Preferably, the at least one ferromagnetic metal piece and the at least one magnetic piece have different shapes or have different numbers.

Preferably, the at least one ferromagnetic metal sheet is formed with at least one gap in a circumferential direction around the region.

Preferably, the ferromagnetic metal sheet and the magnetic sheet are stacked by means of adhesion or mechanical press-fit.

Preferably, the size of the magnetic sheet coverage area is larger than or equal to the size of the positioning magnet of the wireless power receiving end;

the size of the coverage area of the ferromagnetic metal sheet is larger than or equal to that of the positioning magnet of the wireless power receiving end.

Preferably, the at least one ferromagnetic metal sheet is an annular ferromagnetic metal sheet surrounding the circular region; or

The at least one ferromagnetic metal sheet is a plurality of ferromagnetic metal sheets which are arranged at intervals to surround the region; or

The at least one ferromagnetic metal sheet is a sector annular ferromagnetic metal sheet partially surrounding the circular area; or

The at least one ferromagnetic metal sheet is a plurality of annular ferromagnetic metal sheets concentrically arranged around the center of the region, and the annular ferromagnetic metal sheets have gaps along the radial direction; or

The at least one ferromagnetic metal sheet comprises a plurality of metal sheet groups, each metal sheet group comprises a plurality of ferromagnetic metal sheets arranged along the circumferential direction of the region, different metal sheet groups are nested along the region, and different ferromagnetic metal sheets in the metal sheet groups are arranged at intervals along the circumferential direction.

In a second aspect, an embodiment of the present invention provides a wireless power transmitting kit, including:

the wireless power transmitting end is arranged on the opposite surface of the charging surface to transmit wireless power to the charging surface; and

the wireless charging auxiliary device is arranged on the charging surface and opposite to the transmitting coil of the wireless power transmitting end, so as to assist the mutual positioning of the wireless power receiving end and the wireless power transmitting end.

In a third aspect, an embodiment of the present invention provides a piece of furniture, including:

a mesa having a first face as a charging surface and an opposing second face;

the wireless charging auxiliary device is arranged on the first surface to assist the wireless power receiving end and the wireless power transmitting end to be mutually positioned.

Preferably, the furniture further comprises:

the wireless power transmitting end is arranged on the second surface and used for transmitting wireless power to the charging surface;

the wireless charging auxiliary device is arranged at a position opposite to an electric energy transmitting coil of the wireless electric energy transmitting end.

The embodiment of the utility model provides a through setting up one and surround or partially surround the magnetic sheet with the regional that electric energy receiving coil size corresponds, further stack a ferromagnetic metal piece that shape at least partially covers the magnetic sheet on the magnetic sheet, the magnetic adsorption through magnetic sheet and ferromagnetic metal piece sets up the magnet device around electric energy receiving coil, therefore, ferromagnetic metal piece can increase the adsorption affinity, realize the accurate location of wireless power transmitting terminal and wireless power receiving terminal, and simultaneously, further reduce the vortex because alternating magnetic field leads to through the magnetic sheet, reduce the unnecessary loss.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

FIG. 1 is a circuit schematic of a prior art wireless charging system;

fig. 2 is a schematic diagram of a wireless power receiving end for which the wireless charging auxiliary device according to the embodiment of the present invention is applied;

FIG. 3 is a schematic diagram of a prior art wireless charging system;

fig. 4 is a schematic diagram of a wireless charging system according to an embodiment of the present invention;

fig. 5 is a position relationship diagram of each component in the alignment state of the wireless charging system according to the embodiment of the present invention;

fig. 6 is a cross-sectional view of a wireless charging assist device according to an embodiment of the present invention;

fig. 7 is a schematic diagram of one implementation of a ferromagnetic metal sheet of a wireless charging assist device according to an embodiment of the invention;

fig. 8 is a schematic diagram of another implementation of a ferromagnetic metal sheet of a wireless charging assist device according to an embodiment of the invention;

fig. 9 is a schematic diagram of an implementation of a magnetic sheet of a wireless charging accessory device according to an embodiment of the present invention;

fig. 10 is a schematic diagram of another implementation of the magnetic sheet of the wireless charging accessory device of an embodiment of the present invention;

fig. 11 is a schematic diagram of another implementation of a magnetic sheet of a wireless charging accessory according to an embodiment of the present invention;

fig. 12 is a schematic diagram of yet another implementation of a magnetic sheet of a wireless charging accessory according to an embodiment of the invention;

fig. 13 is a schematic view of a piece of furniture equipped with a wireless charging accessory.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Meanwhile, it should be understood that, in the following description, a "circuit" refers to a conductive loop constituted by at least one element or sub-circuit through electrical or electromagnetic connection. When an element or circuit is referred to as being "connected to" another element or element/circuit is referred to as being "connected between" two nodes, it may be directly coupled or connected to the other element or intervening elements may be present, and the connection between the elements may be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it is intended that there are no intervening elements present.

Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1, a typical wireless charging system includes a wireless power transmitting terminal 1 including an input capacitor Vin, an inverter circuit 11, and a power transmitting coil 12. The wireless power receiving terminal 2 includes a power receiving coil 21 and a rectifying circuit 22. The power transmitting coil 12 and the power receiving coil 21 are coupled to each other in a non-contact manner by an alternating magnetic field of a resonance frequency, thereby realizing wireless power transfer. The rectifying circuit 22 is used to convert the alternating current generated by the power receiving coil 21 in response to the alternating magnetic field into a direct current output. In general, the rectifier circuit 22 may employ a full-bridge rectifier circuit or a half-bridge rectifier circuit. During wireless charging, it is desirable that the power transmitting coil 12 can form good coupling with the power receiving coil 21 to maximize charging efficiency. While good coupling depends on the distance of the power transmitting coil 12 and the power receiving coil 21 and the alignment of the coil faces on which they are located.

In order to better realize the positioning alignment of the wireless power transmitting terminal and the wireless power receiving terminal, a wireless power receiving terminal with an auxiliary positioning magnet is provided. As shown in fig. 2, in such a radio power receiving terminal, a magnet 23 for positioning is provided around a power receiving coil 21 provided inside thereof. Since the back surface of the wireless power transmitting coil is generally provided with a magnetism isolating sheet, the magnet 23 and the magnetism isolating sheet may be attached to each other for positioning.

Fig. 3 is a schematic diagram of a prior art wireless charging system. In the system shown in fig. 3, the wireless power transmitting terminal 1 is disposed under the table top of a table. For a wireless power transmitting terminal adopting a remote wireless charging technology, an alternating magnetic field generated by a power transmitting coil can effectively penetrate through a table top made of wood, marble or glass. This makes it possible to directly place the wireless power receiving terminal 2, such as a mobile phone, on the charging surface (i.e., within the range of the alternating magnetic field) on the desktop to obtain the induced voltage, thereby realizing charging. This technology greatly increases the possibility of applying wireless charging in public places, such as airports, train stations, restaurants, and the like. However, in such a wireless charging system, since the gap between the wireless power transmitting terminal 1 and the wireless power receiving terminal 2 is large, the interaction force between the magnet 23 disposed in the wireless power receiving terminal 2 and the magnetism isolating sheet disposed in the wireless power transmitting terminal 1 is greatly weakened, so that the two cannot be accurately positioned based on the mutual adsorption force. Meanwhile, since the wireless power transmitting terminal 1 is disposed under the desktop and the area of the desktop is large, it is difficult for the user to know the position of the charging surface, and the requirement for positioning is further increased.

Fig. 4 is a schematic diagram of a wireless charging system according to an embodiment of the present invention. As shown in fig. 4, the utility model discloses wireless charging system of embodiment includes wireless power transmitting terminal 3, wireless power receiving terminal 4 and sets up between wireless power transmitting terminal and wireless power receiving terminal, with both the wireless auxiliary device 5 that charges that does not have the mechanical connection relation. The wireless power receiving terminal 4 has a power receiving coil 41 and a magnet 42 disposed around the power receiving coil. The main body of the wireless charging auxiliary device 5 is at least one magnetic sheet 51 and at least one ferromagnetic metal sheet 52 superposed on the magnetic sheet. At least one magnet piece 51 is arranged around the center a so as to completely surround or partially surround the projection area X of the power receiving coil 41 on the plane on which the magnet piece 51 is located. And below the region is a position where the power transmitting coil of the wireless power transmitting terminal 3 is located. In fig. 4, the wireless power transmitting terminal 3 is disposed on the lower surface of a desk panel 6, and the wireless charging assistant device 5 is disposed on the upper surface of the panel 6. Meanwhile, the wireless power receiving terminal 4 is placed on the wireless charging assist device 5.

In the present embodiment, the magnetic sheet 51 is made of a material having magnetism, and has a flat sheet-like shape, that is, a small dimension in the thickness direction with respect to its dimension on the charging surface. This allows the magnetic sheet 51 to be disposed on the charging plane without causing unevenness of the charging plane that affects placement of the wireless power receiving terminal. In particular, the material with magnetic properties may be a ferromagnetic, amorphous magnetic material or a nanocrystalline magnetic material. The magnetic material can be prepared by bonding and molding the magnetic material in a powder state through a plastic material or by high-temperature or laser sintering.

The ferromagnetic metal pieces 52 may be made of a metal material that can be attracted by a magnet, such as iron or an iron alloy. Therefore, the ferromagnetic metal sheet 52 provides mutual adsorption with the magnet 42 at the wireless electric energy receiving end, the adsorption force is increased, and meanwhile, the magnetic sheet 51 is arranged between the electric energy transmitting coil and the ferromagnetic metal sheet, so that the eddy current generated by the alternating magnetic field on the metal material can be reduced, and the loss is reduced.

Meanwhile, the magnetic sheet 51 has magnetism and can be attracted to the magnet 42 in the wireless power receiving terminal 4. When the magnetic sheet 51 and the magnet 42 are attracted to each other, the power receiving coil 41 in the wireless power receiving terminal 4 is aligned with the area X completely surrounded or partially surrounded by the magnetic sheet 51. Thereby, the power receiving coil 41 and the power transmitting coil 31 are aligned with each other, resulting in better coupling.

Fig. 5 is a positional relationship diagram of each component of the wireless charging system in the alignment state according to the embodiment of the present invention. In order to more clearly understand the positional relationship of the components, fig. 5 is shown in a sectional view, and the housings of the respective devices are shown in broken lines. Fig. 5 shows the relationship of the power transmitting coil 31, the power receiving coil 41, the magnet 42 and the magnetic sheet 51 in the aligned state with the ferromagnetic metal sheet 52. As shown in fig. 5, the power transmitting coil 31 is disposed below the panel 6. The panel 6 has a certain thickness, for example a thickness greater than 10 mm. The power receiving coil 41 is disposed above the panel 6. The magnet 42 is disposed around the power receiving coil 41 in the same plane as the power receiving coil 41. The magnet 42 and the wireless charging assist device 5 including the magnetic sheet 51 and the ferromagnetic metal sheet 52 are aligned with each other by magnetic attraction, which allows the power receiving coil 41 surrounded by the magnet 42 to be aligned with the region X surrounded by the magnetic sheet 51, which is aligned with the power transmitting coil 31. Thereby, the power receiving coil 41 and the power transmitting coil 31 are aligned with each other, resulting in better coupling. Meanwhile, when the wireless charging assist device 5 and the magnet 42 are attracted by alignment, the magnet 42 is partially or entirely shielded by the magnetic sheet 51 and the ferromagnetic metal sheet 52, and thus the influence of the alternating magnetic field from the power transmitting coil 31 on the magnet is reduced or completely shielded. This makes the eddy current that produces because alternating magnetic field acts on magnet reduce or be zero, has reduced the extra loss that leads to because the magnet, has also reduced the heating of magnet, has improved wireless charging system's overall efficiency. In an alternative implementation, the magnetic sheet 51 and the ferromagnetic metal sheet 52 have a width greater than or equal to the width of the magnet 42 and have the same shape as the magnet, whereby the magnetic sheet 51 can completely shield the magnet 42, minimizing losses in the magnet.

In an alternative implementation, as shown in fig. 2, the power receiving coil 41 and the magnet 42 are each formed in a circular shape. Correspondingly, the magnetic sheet 51 and the ferromagnetic metal sheet 52 may also be formed in circular shapes. The magnetic sheet 51 and the ferromagnetic metal sheet 52 have inner diameters smaller than that of the magnet 42 and outer diameters larger than that of the magnet 42, thereby shielding the magnet 42 completely from the wireless charging assist device. More preferably, the ferromagnetic metal plate 52 is completely covered by the magnetic sheet 51, so that the space between the ferromagnetic metal plate 52 and the power transmitting coil is completely covered by the magnetic sheet 51, which can effectively reduce the eddy current generated by the alternating magnetic field on the ferromagnetic metal plate 52 and reduce the loss to a certain extent.

Fig. 6 is a cross-sectional view of the wireless charging assistance device according to the embodiment of the present invention. As shown in fig. 6, in order to more conveniently fix the wireless charging assist device to the charging surface, a fixing device 53 may be provided on the lower side of the magnetic sheet 51 (i.e., the side opposite to the ferromagnetic metal sheet 52) to be fixed. In this embodiment, the fixing device 53 may be an adhesive layer. Meanwhile, if the magnetic sheet is provided in plurality as shown in fig. 7, the fixing means 53 may be provided in the form of a circular adhesive tape with an adhesive layer so as to fix the plurality of magnetic sheets thereto. It will be readily appreciated that in some implementations, the fixture may not be part of the wireless charging accessory device.

Further, in order to better identify the charging surface, so that a user at the wireless power receiving end can clearly identify the approximate area of the table top for wireless charging, the wireless charging auxiliary device can be set to have a significant difference from the color or texture of the table top. Thus, after the wireless charging assist device 5 is fixed to the floor, the position of the charging area can be indicated to the user by the annular shape. To this end, one or more decorative layers 54 may also be provided on the other side of the magnetic sheet 51 (i.e., the side of the magnetic sheet facing the radio energy receiving end), as shown in fig. 6. The decorative layer may have a color or texture such that the surface of the wireless charging accessory has a color and/or texture different from the charging surface (in this embodiment, the table top). For example, if the table top is made of black glass, a wireless charging auxiliary device with a silver or white decorative layer can be used. Thereby clearly prompting the charging area. And then when the user placed the wireless power receiving terminal, the adsorption affinity guide of magnetic sheet carries out the location of aiming at accurately, improves charge efficiency.

Meanwhile, the ferromagnetic metal piece 52 and the magnetic piece 51 may be tightly bonded by adhesion or mechanical press-fitting. An adhesive layer (not shown) is provided between the ferromagnetic metal piece 52 and the magnetic piece 51 when they are adhered to each other.

As described above, the ferromagnetic metal piece 52 and the magnetic piece 51 may be both shaped as circular rings. In addition, the ferromagnetic metal sheet 52 may be provided in a different form.

Fig. 7-8 are schematic views of implementations of different forms of ferromagnetic metal sheets. In an alternative implementation, as shown in fig. 7, the ferromagnetic metal sheet 52 may be provided in a sector ring shape with an angle close to 360 degrees, or may be regarded as a gap or clearance S provided in the circumferential direction of a circular ring shape.

In another alternative implementation, as shown in fig. 8, the number of the ferromagnetic metal sheets 52 is plural, and each of the ferromagnetic metal sheets 52 is formed in a sector ring shape, which is disposed around the region X so as to form a ring shape. The ferromagnetic metal pieces 52 are spaced apart from each other. In fig. 8, the ferromagnetic metal pieces 52 are arranged in the same shape. Alternatively, the ferromagnetic metal pieces may be differently shaped or sized. Alternatively, the ferromagnetic metal sheets 52 may be arranged in a rectangular, trapezoidal, or other shape disposed around the perimeter of the circular region.

Alternatively, the ferromagnetic metal sheets 52 may also be arranged in a plurality of mutually nested circular rings, or one or more gaps may be further formed on the mutually nested circular rings, respectively.

The ferromagnetic metal sheets 52 are arranged to be spaced apart from each other or have a shape of a gap, so that the conductive ferromagnetic metal sheets can be prevented from forming a closed current loop in the circumferential direction around the region X, and a ring-shaped current around the region X is formed under the influence of the alternating magnetic field, thereby reducing the loss caused by the ferromagnetic metal sheets 52.

Similarly, the magnetic sheet 51 may be provided in a different form. Fig. 9-12 are schematic diagrams of implementations of different configurations of magnetic flakes. In an alternative implementation, as shown in fig. 9, the wireless charging assist device 5 is provided with a plurality of magnetic pieces 51. Each magnetic sheet 51 is formed in a fan-ring shape, a trapezoid shape, or a rectangular shape. The magnetic sheets may be identical or different in shape and size. In fig. 9, the magnetic sheet 51 is formed in a fan-ring shape having the same shape and size. The plurality of magnet pieces 51 are circumferentially spaced from each other to form a ring having a gap, surrounding the region X. When the inner diameter of the magnetic ring is smaller than the outer diameter of the receiving coil in the mobile phone, the magnetic sheet 51 can not completely block the power receiving coil to influence the coupling. Correspondingly, a ferromagnetic metal plate 52 (not shown) of the same shape and slightly smaller or the same size may be provided on each magnetic sheet 51.

In another alternative implementation, as shown in fig. 10, the wireless charging accessory 5 is provided with a magnetic sheet 51 a. Unlike fig. 9, the magnetic sheet 51a of fig. 10 is provided in a fan-ring shape, that is, a notch S is provided in a ring. Thus, similarly to fig. 10, the magnetic sheet 51a shown in fig. 8 can reduce the probability of shielding the power receiving coil from affecting the coupling while maintaining the attraction ability to the magnet.

The mode of having the opening can prevent that alternating magnetic field from forming the vortex of the great range that flows along the annular appearance, can reduce the loss to a certain extent.

In yet another alternative implementation, as shown in fig. 11, the wireless charging accessory is provided with a plurality of magnetic pieces 51 b. Each magnetic sheet 51b is formed in a circular shape with a different size, and is concentrically arranged, that is, a plurality of circular magnetic sheets 51b are nested. By setting the size of each magnet piece 51b, an annular gap S exists between adjacent magnet pieces 51 b. Meanwhile, the widths of the magnetic pieces 51b may be the same or different, and the widths of the annular gaps S between the magnetic pieces may be the same or different, which may be set according to actual conditions and needs.

Further, in another alternative implementation, as shown in fig. 12, the ring-shaped magnetic sheet 51b may be replaced with a plurality of magnetic sheets 51c of a sector ring shape, a trapezoid shape or a rectangular shape arranged along the circumference. Different magnetic sheets are spaced from each other in the radial direction or the circumferential direction to form a gap. Thus, the area of each magnetic sheet can be reduced, and eddy current can be reduced.

It will be appreciated that the wireless charging assistance device 5 may also be provided in other shapes, the shape of which and the shape of the surrounding area being dependent on the shape of the power receiving coil of the wireless power receiving end for which it is intended and the shape of the magnet assembly disposed around the coil.

In an alternative implementation, the number of ferromagnetic metal pieces 52 may be the same as the number of magnetic pieces 51, while the shape is set substantially the same, the two being the same size or the magnetic pieces 51 being slightly larger in size.

In another alternative implementation, the number of ferromagnetic metal sheets 52 may be different from the number of magnetic sheets 51, for example, a plurality of magnetic sheets 52 in a fan-ring shape are disposed on one circular or single magnetic sheet 51 in a fan-ring shape.

The utility model discloses wireless auxiliary device that charges can also make and sell that various systems are supporting. For example, in one implementation, the wireless charging accessory may be manufactured and sold in association with the wireless power transmitting terminal. For another example, in another implementation, the wireless charging accessory may also be manufactured and sold in association with furniture carrying the wireless power transmitting end.

As shown in fig. 13, the furniture 7 is a table having a table top 6, and the wireless charging assist device 5 can be mounted to a predetermined area of the table top 6 in a uniform manner after the table body is manufactured. Meanwhile, the wireless power transmitting terminal 4 (not shown in the figure) can be correspondingly installed below the table top 6, or a mark or a component for assisting positioning can be arranged at a corresponding installation position below the table top 6. Thus, the furniture 7 can effectively realize the auxiliary alignment of the wireless power receiving end.

The embodiment of the utility model provides a through setting up one and surround or partially surround the magnetic sheet that corresponds with the electric energy receiving coil size regional, further stack a ferromagnetic metal piece that shape at least partially covers the magnetic sheet on the magnetic sheet, the magnetic adsorption through magnetic sheet and ferromagnetic metal piece sets up the magnet device around electric energy receiving coil, therefore, ferromagnetic metal piece can increase the adsorption affinity, realize the accurate location of wireless power transmitting terminal and wireless power receiving terminal, and simultaneously, further reduce the vortex because alternating magnetic field leads to through the magnetic sheet, reduce the unnecessary loss.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (15)

1. The utility model provides a wireless auxiliary device that charges for supplementary wireless electric energy receiving terminal and wireless electric energy transmitting terminal mutual positioning, its characterized in that, wireless auxiliary device that charges includes:

at least one magnetic sheet disposed around a center so as to completely or partially surround an area having a size greater than or equal to a size of a power receiving coil of the wireless power receiving terminal, wherein the magnetic sheet has magnetism; and

at least one ferromagnetic metal sheet overlying the magnetic sheet.

2. The wireless charging assist device according to claim 1, wherein the at least one magnetic sheet has an overall shape identical to or similar to a shape of a positioning magnet provided in the wireless power receiving terminal.

3. The wireless charging accessory device of claim 1, further comprising:

at least one fixing member disposed on a back surface of the magnetic sheet to fix the magnetic sheet to a charging surface.

4. The wireless charging accessory device of claim 3, further comprising:

at least one decorative layer disposed on the ferromagnetic metal sheet such that a surface of the wireless charging accessory has a different color and/or texture than the charging surface.

5. The wireless charging accessory device of claim 1, wherein the at least one magnetic sheet is an annular magnetic sheet surrounding a circular area; or

The at least one magnetic sheet is a plurality of magnetic sheets which are arranged at intervals to surround the area; or

The at least one magnetic sheet is a fan-shaped magnetic sheet partially surrounding the circular area; or

The at least one magnetic sheet is a plurality of annular magnetic sheets concentrically arranged around the center of the area, and gaps are formed in the annular magnetic sheets along the radial direction; or

At least one magnetic sheet includes a plurality of magnetic sheet groups, and every magnetic sheet group includes a plurality of edges the magnetic sheet that regional circumference set up, different magnetic sheet group edge regional nested setting, different magnetic sheets in the magnetic sheet group set up along circumference interval.

6. The wireless charging assist device according to claim 1, wherein the at least one ferromagnetic metal piece and the at least one magnetic piece are disposed in one-to-one correspondence and have the same shape.

7. The wireless charging accessory device of claim 1, wherein the ferromagnetic metal pieces are smaller in size than the corresponding magnetic pieces.

8. The wireless charging accessory device of claim 5, wherein the at least one ferromagnetic metal sheet and the at least one magnetic sheet have different shapes or have different numbers.

9. The wireless charging accessory device of claim 1, wherein the at least one ferromagnetic metal sheet is formed with at least one gap in a circumferential direction around the region.

10. The wireless charging assist device according to claim 1, wherein the ferromagnetic metal sheet and the magnetic sheet are stacked by adhesion or mechanical press-fit.

11. The wireless charging auxiliary device according to claim 1, wherein the size of the magnetic sheet covering area is greater than or equal to the size of a positioning magnet of the wireless power receiving terminal;

the size of the coverage area of the ferromagnetic metal sheet is larger than or equal to that of the positioning magnet of the wireless power receiving end.

12. The wireless charging accessory device of claim 1 or 5, wherein the at least one ferromagnetic metal sheet is an annular ferromagnetic metal sheet surrounding a circular region; or

The at least one ferromagnetic metal sheet is a plurality of ferromagnetic metal sheets which are arranged at intervals to surround the region; or

The at least one ferromagnetic metal sheet is a sector annular ferromagnetic metal sheet partially surrounding the circular area; or

The at least one ferromagnetic metal sheet is a plurality of annular ferromagnetic metal sheets concentrically arranged around the center of the region, and the annular ferromagnetic metal sheets have gaps along the radial direction; or

The at least one ferromagnetic metal sheet comprises a plurality of metal sheet groups, each metal sheet group comprises a plurality of ferromagnetic metal sheets arranged along the circumferential direction of the region, different metal sheet groups are nested along the region, and different ferromagnetic metal sheets in the metal sheet groups are arranged at intervals along the circumferential direction.

13. A wireless power transmission kit, comprising:

the wireless power transmitting end is arranged on the opposite surface of the charging surface to transmit wireless power to the charging surface; and

the wireless charging assist apparatus as claimed in any one of claims 1 to 12, disposed on the charging surface at a position opposite to the transmitting coil of the wireless power transmitting terminal to assist the mutual positioning of the wireless power receiving terminal and the wireless power transmitting terminal.

14. An article of furniture, comprising:

a mesa having a first face as a charging surface and an opposing second face;

the wireless charging assist device as claimed in any one of claims 1-12, disposed on the first face to assist the wireless power receiving end and the wireless power transmitting end to locate each other.

15. The furniture according to claim 14, further comprising:

the wireless power transmitting end is arranged on the second surface and used for transmitting wireless power to the charging surface;

the wireless charging auxiliary device is arranged at a position opposite to an electric energy transmitting coil of the wireless electric energy transmitting end.

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