Wireless charging device

Abstract

The utility model provides a wireless charging device which comprises a first charging assembly, a second charging assembly and an input assembly, the first charging assembly comprises a first shell, a first coil and a winding component, the first shell is provided with a first accommodating cavity and a wire outlet hole, and the wire outlet hole is communicated with the first accommodating cavity and an external space; the first coil and the winding component are located in the first containing cavity, and the winding component is in running fit with the first shell. The second charging assembly comprises a second shell and a second coil, the second shell is provided with a second accommodating cavity, the second shell is connected with the first shell, and the second coil is arranged in the second accommodating cavity; the input assembly comprises a circuit board and a power line, the circuit board is arranged in the first containing cavity and / or the second containing cavity, and the circuit board is electrically connected with the power line, the first coil and the second coil; the power line is wound around the winding component, and one end of the power line penetrates through the wire outlet hole and is provided with a plug terminal extending out of the first shell. The wireless charging device can charge a plurality of devices and is simple in structure and convenient to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of charging equipment, in particular to a wireless charging device. BACKGROUND

[0002] With the increasing requirements of power supply quality, safety, reliability, convenience, immediacy, special occasions, special geographical environment and the like of the electrical equipment, the contact type power transmission mode is increasingly unable to meet the actual needs. The wireless charger is a device for charging by using the principle of electromagnetic induction. Its principle is similar to that of a transformer. A coil is arranged at each of the sending and receiving ends. The sending end coil sends electromagnetic signals to the outside under the action of electric power. The receiving end coil receives the electromagnetic signals and converts them into electric current, thereby achieving wireless charging. The wireless charging technology is a special power supply mode. It does not need to be electrically connected with the device to be charged through a data line, relies on electromagnetic wave propagation, and then converts electromagnetic wave energy into electric energy to finally realize wireless charging.

[0003] Some wireless charging devices for charging multiple devices at the same time have appeared on the market. However, when designing the wireless charging device, the design of the wireless charging module is mainly considered, and the design of the power input module is easily ignored, resulting in the technical problems of high cost and complex structure of the wireless charging device in the prior art. CONTENT OF THE INVENTION

[0004] The technical problem solved by the present application is to provide a wireless charging device capable of charging multiple devices, simple in structure and convenient to use.

[0005] The wireless charging device provided by the present application comprises:

[0006] The first charging assembly comprises a first housing, a first coil and a winding member. The first housing has a first accommodating cavity and a wire outlet hole. The wire outlet hole is connected to the first accommodating cavity and an external space. The first coil and the winding member are located in the first accommodating cavity. The winding member is rotationally connected to the first housing.

[0007] The second charging assembly comprises a second housing and a second coil. The second housing has a second accommodating cavity. The second housing is connected to the first housing. The second coil is arranged in the second accommodating cavity.

[0008] The input assembly comprises a circuit board and a power cord. The circuit board is arranged in the first accommodating cavity and / or the second accommodating cavity. The circuit board is electrically connected to the power cord, the first coil and the second coil.

[0009] The power cord is wound around the winding member. The winding member is used to accommodate the power cord and adjust the length of the power cord extending out of the first housing. One end of the power cord is arranged in the wire outlet hole and has a plug-in terminal extending out of the first housing. The plug-in terminal is used for external electrical connection.

[0010] In an alternative embodiment, the first shell is provided with a fixing structure for fixing the plug-in terminal.

[0011] In an alternative embodiment, the fixing structure is a first magnetic attraction member, and the plug-in terminal is provided with a second magnetic attraction member, and the first magnetic attraction member and the second magnetic attraction member are magnetically attracted and fixed.

[0012] In an alternative embodiment, the winding member comprises a winding reel and a first damping component, and the first damping component is in transmission connection with the winding reel and the first shell, so that the winding reel can rotate in the first shell and has elastic return force;

[0013] The first shell and the winding reel have matching clamping structures, so that the winding reel and the first shell can relatively rotate and be clamped or separated from each other.

[0014] In an alternative embodiment, the power cord further has a protrusion which is arranged in space with the plug-in terminal, the protrusion and the plug-in terminal both protrude out of the first shell, the cross-sectional dimension of the protrusion is greater than the cross-sectional dimension of the wire outlet hole, so as to block the plug-in terminal outside the first accommodating cavity.

[0015] In an alternative embodiment, the first shell has a first charging wall, and the first coil is fixed to the first charging wall; the second shell has a second charging wall;

[0016] In the thickness direction of the first shell, the second shell is hingedly connected to the side of the first shell which is away from the first charging wall, and the first shell and the second shell can be switched between an unfolded and side-by-side state and a folded and stacked state, and in the folded and stacked state, the second charging wall is located on the side of the second shell which is away from the first shell.

[0017] In an alternative embodiment, the first shell has a receiving recess, and in the folded and stacked state, the second shell is at least partially received in the receiving recess; the first shell has an avoiding portion for avoiding the second shell when the second shell rotates.

[0018] In an alternative embodiment, the outer surface of the first charging wall is a plane, and the outer surface of the region of the second charging wall corresponding to the second wireless charging module is a concave circular arc surface.

[0019] In an alternative embodiment, the thickness direction of the first shell is the winding axis of the power cord, and the wire outlet hole is arranged on the circumferential side wall of the first shell in the thickness direction.

[0020] In an alternative embodiment, the wireless charging device further comprises a management assembly which is electrically connected with the circuit board and is used for selectively controlling at least one of the first coil and the second coil to work.

[0021] The wireless charging device according to the above-mentioned embodiments has the first charging assembly and the second charging assembly, the circuit board is electrically connected with the power cord, the first coil and the second coil, and thus different devices can be charged respectively. The power cord is installed in the first accommodating cavity and wound on the winding member, and the power cord can supply power to the first coil and the second coil. Only one power cord is needed, and external electrical connection is performed through the plug-in terminal of the power cord, so that the power input of the first charging assembly and the second charging assembly can be realized. The first charging assembly and the second charging assembly do not need to have a power cord or a power interface at the same time, the structure of the wireless charging device is simplified, and the production cost can be effectively controlled. At the same time, the power cord is wound on the winding member, the power cord is pulled outwards, the winding member can rotate, and then the power cord is unwound. After use, the power cord can be wound by reverse rotation of the winding member, the power cord is prevented from being entangled with other objects, the tidiness is greatly improved, and use is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The overall schematic view of the wireless charging device in a folded and stacked state is provided for some embodiments of the present application.

[0023] Figure 2 The another view schematic view of the wireless charging device is provided for Figure 1 .

[0024] Figure 3 The partial exploded schematic view of the wireless charging device is provided for Figure 1 .

[0025] Figure 4 The another view schematic view of the wireless charging device is provided for Figure 3 .

[0026] Figure 5 The further exploded schematic view of the wireless charging device is provided for Figure 3 .

[0027] Figure 6 The another view schematic view of the wireless charging device is provided for Figure 5 .

[0028] Figure 7 The overall schematic view of the wireless charging device in an unfolded and side-by-side state is provided for some embodiments of the present application.

[0029] Figure 8 The another view schematic view of the wireless charging device is provided for Figure 7 .

[0030] Figure 9 The exploded schematic view of the second charging assembly of the wireless charging device is provided for some embodiments of the present application.

[0031] 100 - wireless charging device; 10 - first charging assembly; 11 - first housing; 111 - first accommodating cavity; 112 - wire outlet hole; 113 - first charging wall; 114 - receiving recess; 115 - avoiding part; 12 - first coil; 13 - winding member; 131 - wire winding frame; 132 - first damping part; 20 - second charging assembly; 21 - second housing; 211 - second accommodating cavity; 212 - second charging wall; 22 - second coil; 30 - input assembly; 31 - circuit board; 32 - power cord; 321 - plug-in terminal; 322 - protrusion; 40 - first magnetic attraction member; 50 - second magnetic attraction member; 60 - metal sheath. DETAILED DESCRIPTION

[0032] The application will be further described below in connection with the drawings. Like numbers in different figures represent similar elements. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. Flowever, it will be apparent to one skilled in the art that the application can be practiced without the specific details given. In other instances, well-known methods have not been described in detail in order not to unnecessarily obscure the application. Embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings in which like references indicate similar elements.

[0033] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. Meanwhile, the steps or actions in the method description can also be sequentially adjusted or changed in a manner that is obvious to those skilled in the art. Therefore, the order in the specification and the drawings is only for the purpose of clearly describing a certain embodiment, and does not mean that the order is necessary, unless otherwise stated that a certain order must be followed.

[0034] The serial numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. The "connection" and "coupling" in this application include direct and indirect connection (coupling) unless otherwise specified.

[0035] Reference should be made to Figures 1-4The application provides a wireless charging device 100, which comprises a first charging assembly 10, a second charging assembly 20 and an input assembly 30, wherein the first charging assembly 10 comprises a first shell 11, a first coil 12 and a winding member 13, the first shell 11 has a first accommodating cavity 111 and a wire outlet hole 112, the wire outlet hole 112 is communicated with the first accommodating cavity 111 and an external space, the first coil 12 and the winding member 13 are located in the first accommodating cavity 111, and the winding member 13 is rotationally matched with the first shell 11; the second charging assembly 20 comprises a second shell 21 and a second coil 22 arranged in the second shell 21, and the second shell 21 is connected with the first shell 11; the input assembly 30 comprises a circuit board 31 and a power line 32, the circuit board 31 is arranged in the first accommodating cavity 111 and / or a second accommodating cavity 211, and the circuit board 31 is electrically connected with the power line 32, the first coil 12 and the second coil 22; the power line 32 is wound around the winding member 13, the winding member 13 is used for accommodating the power line 32 and adjusting the length of the power line 32 extending out of the first shell 11; one end of the power line 32 is arranged in the wire outlet hole 112 and has a plug-in terminal 321 extending out of the first shell 11, and the plug-in terminal 321 is used for external electrical connection.

[0036] The first shell 11 at least accommodates the first coil 12, the winding member 13 and the power line 32 in the first accommodating cavity 111, and the second shell 21 at least accommodates the second coil 22 in the second accommodating cavity 211, so that the functional components for realizing wireless charging and the winding member 13 are separated from the outside, the protection effect is achieved, and the components are distributed compactly. The wireless charging device 100 has the first charging assembly 10 and the second charging assembly 20, the circuit board 31 is electrically connected with the power line 32, the first coil 12 and the second coil 22, different devices can be charged respectively, the power line 32 is installed in the first accommodating cavity 111 and wound around the winding member 13, and power can be supplied to the first coil 12 and the second coil 22, only one power line 32 needs to be configured, external electrical connection is realized through the plug-in terminal 321 of the power line 32, power input of the first charging assembly 10 and the second charging assembly 20 can be realized, the first charging assembly 10 and the second charging assembly 20 do not need to have the power line 32 or the power interface at the same time, the structure of the wireless charging device 100 is simplified, and the production cost can be effectively controlled. Meanwhile, the power line 32 is wound around the winding member 13, the power line 32 only needs to be pulled outwards during use, the winding member 13 can be rotated in reverse direction to wind the power line 32, the power line 32 is prevented from being entangled with other objects, the tidiness is greatly improved, and use is facilitated.

[0037] It should be noted that the above-mentioned "the circuit board 31 is arranged in the first accommodating cavity 111 and / or the second accommodating cavity 211" means that the number of the circuit board 31 can be one or two. In other words, in some embodiments, one circuit board 31 is electrically connected to the first coil 12 and the second coil 22 at the same time to serve as a wireless charging module, and at this time, the circuit board 31 can be arranged in any one of the first accommodating cavity 111 and the second accommodating cavity 211; in other embodiments, the number of the circuit board 31 and the wireless charging module can be two, one circuit board 31 is arranged in the first accommodating cavity 111 and electrically connected to the first coil 12 to form a first wireless charging module, and the other circuit board 31 is arranged in the second accommodating cavity 211 and electrically connected to the second coil 22 to form a second wireless charging module.

[0038] In some embodiments, please refer to Figure 3 , Figure 5 and Figure 9 , since the winding member 13 has occupied most of the internal space of the first shell 11, in order to avoid the influence of the rotation of the winding member 13 on the circuit board 31, the number of the circuit board 31 is one, and the circuit board 31 is arranged in the second shell 21, thereby balancing the sizes of the first shell 11 and the second shell 21, and the overall size of the wireless charging device 100 can also be reduced. The wires connecting various electrical components are not shown in the figure, and the wires connecting the circuit board 31 and the first coil 12 are also not shown, and the specific wire arrangement can be adaptively adjusted according to actual needs, which is not limited in the present application.

[0039] In addition, the above-mentioned "the circuit board 31 is electrically connected to the power cord 32, the first coil 12 and the second coil 22" can be direct connection or indirect connection, as long as the power input can be realized and the first coil 12 and the second coil 22 can send electromagnetic signals.

[0040] In some embodiments, please refer to Figure 1 and Figure 8 , in order to further accommodate the power cord 32, the first shell 11 is provided with a fixing structure for fixing the plug-in terminal 321, so that the relative position between the plug-in terminal 321 of the power cord 32 in the non-use state and the first shell 11 is fixed, thereby playing a role of protecting the plug-in terminal 321 and reducing the probability of damage and breakage of the plug-in terminal 321, and further improving the neatness and beauty of the wireless charging device 100.

[0041] The specific selection of the fixing structure is not limited in the present application, which mainly plays a role of fixing the plug-in terminal 321, for example, in some embodiments, the fixing structure can be a clamp, a clamping groove, etc.

[0042] In some embodiments, please refer to Figure 1 and Figure 8The fixed structure can be the first magnetic attraction piece 40, the plug-in terminal 321 is provided with a second magnetic attraction piece 50, the first magnetic attraction piece 40 is magnetically attracted and fixed with the second magnetic attraction piece 50, the magnetic attraction fixing scheme is simple, has good connection strength, can realize many ways, and will not cause damage such as abrasion to the surface of the plug-in terminal 321.

[0043] In some embodiments, referring to Figure 3 The plug-in terminal 321 is sleeved with a metal sheath 60, the second magnetic attraction piece 50 is a magnetic attraction piece on the metal sheath 60 or provided on the metal sheath 60, the metal sheath 60 can improve the structural strength and external force resistance of the plug-in terminal 321, and can protect the plug-in terminal 321. In some embodiments, the material of the metal sheath 60 can be selected to be a material with obvious magnetism, and then the first magnetic attraction piece 40 is magnetically attracted and fixed. In some embodiments, in order to consider the production cost and the overall weight of the wireless charging device 100, a lighter or non-magnetic material can be selected, and a magnetic attraction piece is bonded and fixed or embedded on the metal sheath 60, and the magnetic attraction piece is magnetically attracted and cooperated with the first magnetic attraction piece 40.

[0044] In some embodiments, referring to Figure 8 The first shell 11 has a mounting groove, the first magnetic attraction piece 40 is a magnetic block mounted in the mounting groove, and the magnetic block is embedded in the first shell 11. It should be noted that the magnetic block can be exposed on the outer surface of the first shell 11, or can be hidden on the outer surface of the first shell 11. In some embodiments, referring to Figure 3 and Figure 8 The mounting groove and the magnetic block are located on the outer surface of the first shell 11, and the magnetic block is exposed, so as to facilitate the user to clearly understand the position of the magnetic block, and facilitate the alignment and connection of the first magnetic attraction piece 40 and the second magnetic attraction piece 50.

[0045] The working mode of the winding member 13 is not limited in the application, in some embodiments, the reverse rotation of the winding member 13 can be realized by a manual driving mode, for example, the first shell 11 can be provided with a knob which is clamped with the winding member 13, and the power cord 32 is wound into the shell by manually rotating the knob. In some embodiments, the reverse rotation of the winding member 13 can also be in a semi-automatic or even automatic mode, for example, it can have a one-key automatic winding function, and it can also be a rotating mechanism similar to a tape measure, without manual rotation, the automatic storage of the power cord 32 can be realized. In short, the winding member 13 can be any feasible data line extension module in the prior art, and the contents of the winding member 13 which are not described in detail can refer to the prior art, and will not be described here.

[0046] For example, in some embodiments, the winding member 13 can include a winding reel 131 and a first damping component 132, the first damping component 132 being drivingly connected to the winding reel 131 and the first housing 11 so that the winding reel 131 is rotatable in the first housing 11 and has an elastic rotation force; the first housing 11 and the winding reel 131 have a matching clamping structure so that the winding reel 131 and the first housing 11 are relatively rotatable and clamped or separated from each other when rotating, that is, the fixing of the power cord 32 after being pulled out to a certain length can be achieved, and the power cord 32 can be wound under the action of the elastic rotation force generated by the first damping component 132 when the clamping structure allows the winding reel 131 and the first housing 11 to be relatively rotatable.

[0047] In some embodiments, the first damping assembly includes a torsional elastic member, the torsional elastic member being arranged in a central groove of the winding reel 131, one end of the torsional elastic member being fixedly connected to the winding reel 131, and the other end of the winding spring being fixedly connected to the first housing 11, so that when the winding reel 131 rotates relative to the first housing 11, the winding reel 131 drives the torsional elastic member to rotate away from the winding center, so that the torsional elastic member is continuously tightened, and the torsional elastic member has an elastic force of reverse rotation, that is, the winding reel 131 has an elastic rotation force. In some embodiments, the torsional elastic member can be a winding spring.

[0048] In some embodiments, please refer to Figures 4-8 In order to protect the plug-in terminal 321 and effectively avoid the collision between the plug-in terminal 321 and the first housing 11 during the winding of the power cord 32, the power cord 32 further has a protruding portion 322 arranged in a spaced manner with the plug-in terminal 321, the protruding portion 322 and the plug-in terminal 321 both extend out of the first housing 11, and the cross-sectional size of the protruding portion 322 is greater than the cross-sectional size of the wire outlet hole 112, so as to block the plug-in terminal 321 outside the first accommodating cavity 111.

[0049] It should be noted that the plug-in terminal 321 can be a TYPE-C terminal or a USB terminal. The wire material of the power cord 32 is a flat wire material for winding, the cross-sectional shape of the protruding portion 322 can be circular, triangular, rectangular, etc., and the cross-sectional shape of the wire outlet hole 112 can also be circular, triangular, rectangular, etc. The above-mentioned "the cross-sectional size of the protruding portion 322 is greater than the cross-sectional size of the wire outlet hole 112" means that at least one of the diameter or the length and width of the protruding portion 322 is greater than the diameter or the length and width size in the corresponding direction of the wire outlet hole 112.

[0050] In some embodiments, please refer to Figure 1 , Figure 7 and Figure 8, the first shell 11 has a first charging wall 113, and the first coil 12 is fixed to the first charging wall 113; the second shell 21 has a second charging wall 212; along the thickness direction of the first shell 11, the second shell 21 is hinged to the side of the first shell 11 away from the first charging wall 113, the first shell 11 and the second shell 21 can be switched between an unfolded side-by-side state and a folded stacked state, and in the folded stacked state, the second charging wall 212 is located on the side of the second shell 21 away from the first shell 11, the first shell 11 and the second shell 21 can be flexibly folded, so that the occupied space can be effectively reduced, and the placement and carrying are facilitated, and the use experience is improved. At the same time, in the folded stacked state, the first charging wall 113 and the second charging wall 212 can be exposed, and the separate use of the first charging assembly 10 and the second charging assembly 20 will not be affected. When the first charging assembly 10 and the second charging assembly 20 need to be used at the same time, the first shell 11 and the second shell 21 can be unfolded, and at this time, the first charging wall 113 and the second charging wall 212 are side by side, and the equipment can be placed at the same time.

[0051] The application does not make specific limitations on the hinging scheme between the first shell 11 and the second shell 21, and can be any technical scheme that can achieve the above-mentioned functional effects.

[0052] In some embodiments, in order to effectively lock the first shell 11 and the second shell 21 at any position, a second damping component can be arranged between the first shell 11 and the second shell 21 to provide sufficient pre-tightening force and torsional force through the second damping component.

[0053] In some embodiments, in order to optimize the overall structure of the wireless charging device 100, please check Figure 4 、 Figure 7 -- Figure 8 , the first shell 11 has a receiving recess 114, and in the folded stacked state, the second shell 21 is at least partially received in the receiving recess 114, so as to further reduce the occupied space in the stacking direction on the basis of folding. The first shell 11 has an avoiding portion 115 for avoiding the second shell 21 when the second shell 21 rotates. Under the action of the avoiding portion 115, the rotating collision and interference of the first shell 11 and the second shell 21 can be avoided, and at the same time, the avoiding portion 115 can further reduce the occupied space in the stacking direction to a certain extent.

[0054] In some embodiments, in order to further reduce the overall thickness of the first shell 11 and the second shell 21 in the folded state, the surface of the second shell 21 away from the first shell 11 can be flush with the surface of the first shell 11 close to the second shell 21, or the surface of the second shell 21 away from the first shell 11 can be recessed relative to the surface of the first shell 11 close to the second shell 21.

[0055] In some embodiments, please refer to Figure 7 , in order to embody the difference between the first charging assembly 10 and the second charging assembly 20, the outer surface of the first charging wall 113 can be a plane, and the outer surface of the area corresponding to the second wireless charging module of the second charging wall 212 can be a concave arc surface, so that the types of devices that the first charging assembly 10 and the second charging assembly 20 can be applied to are not completely the same. For example, if the first charging wall 113 is a plane, it can mainly be used for charging mobile phones, tablets and the like, and secondarily used for charging watches, bracelets and the like, while the second charging wall 212 can mainly be used for charging devices of small size such as watches and bracelets.

[0056] In some embodiments, please refer to Figures 3-6 , the thickness direction of the first shell 11 is the winding axis direction of the power cord 32, and the outlet hole 112 is arranged on the circumferential side wall of the first shell 11 along the thickness direction, so that the outlet direction of the power cord 32 is located on the side surface of the first shell 11, thereby not affecting the folding of the first shell 11 and the second shell 21, and not affecting the normal use of the first charging wall 113 and the second charging wall 212. Please refer to Figure 3 , in the folded and stacked state, the first charging wall 113 and the second charging wall 212 are opposite in the thickness direction, that is, in this state, the first charging wall 113 and the second charging wall 212 are perpendicular to the thickness direction of the first shell 11.

[0057] In some embodiments, in order to further improve the practicability of the wireless charging device 100 and improve the user experience, the wireless charging device 100 further comprises a management assembly electrically connected with the circuit board 31, for selectively controlling at least one of the first coil 12 and the second coil 22 to work.

[0058] In summary, the wireless charging device 100 provided by the present application has at least the following beneficial effects:

[0059] 1. The first shell 11 at least accommodates the first coil 12, the winding member 13 and the power cord 32 in the first accommodating cavity 111, and the second shell 21 at least accommodates the second coil 22 in the second accommodating cavity 211, so as to separate the functional components for realizing wireless charging and the winding member 13 from the outside, thereby playing a protective role and distributing the components compactly.

[0060] 2. The wireless charging device 100 has a first charging assembly 10 and a second charging assembly 20, and the circuit board 31 is electrically connected with the power cord 32, the first coil 12 and the second coil 22, so that different devices can be charged respectively. The power cord 32 is installed in the first accommodating cavity 111 and wound on the winding member 13, and can supply power to the first coil 12 and the second coil 22. Only one power cord 32 is needed, and external electrical connection is achieved through the plug-in terminal 321 of the power cord 32, so that the power input of the first charging assembly 10 and the second charging assembly 20 can be achieved. The first charging assembly 10 and the second charging assembly 20 do not need to have a power cord 32 or a power interface at the same time, which simplifies the structure of the wireless charging device 100 and can effectively control the production cost.

[0061] 3. The power cord 32 is wound on the winding member 13, and when in use, the power cord 32 only needs to be pulled outwards, and the winding member 13 can rotate and then unwind the power cord 32. When use is completed, the power cord 32 can be wound by reverse rotation of the winding member 13, so as to avoid entanglement of the power cord 32 with other objects, greatly improving the neatness and facilitating use.

[0062] The above application uses specific examples to illustrate the present application, which is only used to help understand the present application and does not limit the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A wireless charging device, characterized by, The application relates to a wireless charging device, which comprises a first charging assembly, a second charging assembly and an input assembly. The first charging assembly comprises a first shell, a first coil and a winding member, the first shell has a first accommodating cavity and a wire outlet hole, the wire outlet hole is communicated with the first accommodating cavity and an external space, the first coil and the winding member are located in the first accommodating cavity, and the winding member is rotationally matched with the first shell. The second charging assembly comprises a second shell and a second coil, the second shell has a second accommodating cavity, the second shell is connected with the first shell, and the second coil is arranged in the second accommodating cavity. The input assembly comprises a circuit board and a power line, the circuit board is arranged in the first accommodating cavity and / or the second accommodating cavity, and the circuit board is electrically connected with the power line, the first coil and the second coil. The power line is arranged around the winding member, the winding member is used for accommodating the power line and adjusting the length of the power line extending out of the first shell, one end of the power line is arranged through the wire outlet hole and has a plug-in terminal extending out of the first shell, and the plug-in terminal is used for external electrical connection. The first shell has a first charging wall, and the first coil is fixed to the first charging wall; the second shell has a second charging wall. In the thickness direction of the first shell, the second shell is hingedly connected to the side of the first shell away from the first charging wall, the first shell and the second shell can be switched between an unfolded side-by-side state and a folded stacked state, and in the folded stacked state, the second charging wall is located on the side of the second shell away from the first shell.

2. The wireless charging device of claim 1, wherein, The first shell is provided with a fixing structure for fixing the plug-in terminal.

3. The wireless charging device of claim 2, wherein, The fixing structure is a first magnetic attraction member, the plug-in terminal is provided with a second magnetic attraction member, and the first magnetic attraction member and the second magnetic attraction member are magnetically attracted and fixed.

4. The wireless charging device of claim 1, wherein, The winding member comprises a winding frame and a first damping component, the first damping component is in transmission connection with the winding frame and the first shell, so that the winding frame can rotate in the first shell and has elastic rotation force. The first shell and the winding frame have matching clamping structures, so that the winding frame and the first shell can relatively rotate and be clamped or separated from each other.

5. The wireless charging device of claim 1, wherein, The power line also has a protruding part arranged at intervals with the plug-in terminal, the protruding part and the plug-in terminal both extend out of the first shell, the cross-sectional dimension of the protruding part is larger than the cross-sectional dimension of the wire outlet hole, so as to block the plug-in terminal outside the first accommodating cavity.

6. The wireless charging device of claim 1, wherein, The first shell has a receiving recess, in the folded stacked state, the second shell is at least partially received in the receiving recess; the first shell has an avoiding part for avoiding the second shell when the second shell rotates.

7. The wireless charging device of claim 1, wherein, The outer surface of the first charging wall is a plane, and the outer surface of the region corresponding to the second wireless charging module of the second charging wall is a concave circular arc surface.

8. The wireless charging device of claim 1, wherein, The thickness direction of the first shell is the winding axis direction of the power line, and the wire outlet hole is arranged on the circumferential side wall of the first shell in the thickness direction.

9. The wireless charging device of claim 1, wherein, The wireless charging device further comprises a management component electrically connected with the circuit board, used for selectively controlling at least one of the first coil and the second coil to work.

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