Wireless charger

Abstract

The embodiment of the utility model discloses a wireless charger which comprises a first cavity and a second cavity which are respectively provided with a built-in charging module, the first cavity and the second cavity are respectively provided with a first inclined surface and a second inclined surface which are mutually attached, and the first inclined surface is provided with a hollow rotating shaft protruding out of the first inclined surface. A rotating shaft hole matched with the hollow rotating shaft to rotate is formed in the second inclined surface; the first inclined plane and the second inclined plane are respectively provided with a limiting piece protruding out of the first inclined plane and a limiting groove matched with the limiting piece; a fixing device used for fixing the hollow rotating shaft and the rotating shaft hole in the axial direction is arranged in the hollow rotating shaft, a hollow hole is formed in the fixing device, and the hollow hole is used for containing a conductive connecting piece connected with the charging module in the first cavity and the charging module in the second cavity. By implementing the technical scheme of the utility model, the storage and folding of the wireless charger can be realized, the internal power line is ensured not to be damaged, the storage space is saved, and the use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of chargers, and particularly relates to a wireless charger. Background Art

[0002] In order to facilitate the simultaneous wireless charging of mobile terminals (including mobile phones, watches, earphones, learning machines, laptop computers, etc.), each device manufacturer has developed a charger that can be used for charging watches, mobile phones, and earphones at the same time. A plurality of charging modules are connected together, and the sizes of the charging modules are different, making the structure of the entire charger relatively messy, inconvenient to store, occupying a large amount of space, and also inconvenient to use. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a wireless charger that can be conveniently stored, is convenient to use, and effectively utilizes space.

[0004] To solve the above technical problem, an embodiment of the utility model provides a wireless charger, which includes a first cavity and a second cavity with built-in charging modules. The first cavity and the second cavity respectively have a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface are mutually attached. The first inclined surface is provided with a hollow rotating shaft protruding from the first inclined surface, and the second inclined surface is provided with a rotating shaft hole that cooperates with the hollow rotating shaft for rotation;

[0005] A limiting member protruding from the first inclined surface and a limiting groove cooperating with the limiting member are respectively arranged on the first inclined surface and the second inclined surface;

[0006]

[0007] A fixing device for axially fixing the hollow rotating shaft and the rotating shaft hole is arranged in the hollow rotating shaft. The fixing device is internally provided with a hollow hole for accommodating a conductive connecting member connecting the charging module in the first cavity and the charging module in the second cavity.

[0008] Further, the rotating shaft hole is a stepped hole, and the rotating shaft hole includes a large hole wall located at the upper part, a small hole wall located at the lower part, and a step surface located between the large hole wall and the small hole wall;

[0009] The hollow rotating shaft is arranged close to the large hole wall and the step surface.

[0010] Further, the cross-section of the limiting groove is semi-circular, and the limiting member includes two parallel first horizontal sides and second horizontal sides;

[0011] ​When the first inclined surface is completely attached to the second inclined surface, either the first horizontal side or the second horizontal side is attached to the diameter of the semi-circle.

[0012] Further, a positioning ball is provided on the limiting member, and two positioning holes cooperating with the positioning ball are symmetrically provided in the limiting groove;

[0013] When the first inclined surface is completely attached to the second inclined surface, the positioning ball is located in the positioning hole.

[0014] Further, magnets are symmetrically provided on both the left and right sides of the first inclined surface and the second inclined surface, and the magnets embedded in the first inclined surface and the magnets embedded in the second inclined surface are correspondingly arranged when the first inclined surface and the second inclined surface are completely attached.

[0015] Further, the fixing device includes a fixing shaft and a snap ring;

[0016] The fixing shaft includes a fixing cap and a fixing rod, and the fixing shaft has the hollow hole penetrating the fixing cap and the fixing rod. The fixing rod is arranged in the hollow rotating shaft, and an annular groove is provided at one end of the fixing rod far from the fixing cap;

[0017] The snap ring is arranged in the annular groove and is attached to the lower edge of the inner wall of the small hole. The fixing shaft cooperates with the snap ring to axially fix the hollow rotating shaft and the rotating shaft hole.

[0018] Further, the snap ring is a ring with an opening, and three inwardly protruding fixing bumps are spacedly arranged on the inner ring of the ring.

[0019] Further, the fixing device includes a fixing shaft and a fixing piece;

[0020] The fixing shaft includes a fixing cap and a fixing rod, and the fixing shaft has the hollow hole penetrating the fixing cap and the fixing rod. The fixing rod is arranged in the hollow rotating shaft, and an annular groove is provided at one end of the fixing rod far from the fixing cap;

[0021] The fixing piece includes a fixing handle and a fixing bayonet. A fixing hole is provided on the fixing handle for fixing with the second inclined surface. A fixing groove is provided on the fixing bayonet. The bottom of the fixing groove is semi-circular, and two relatively parallel sides are provided on the upper part of the fixing groove;

[0022] The annular groove is clamped in the fixing groove for fixing.

[0023] Further, the wireless charger further includes a third cavity with an internal charging module;

[0024] A groove for accommodating the third cavity is provided on the first cavity. Circular hollow shafts are respectively provided on two opposite groove walls in the groove, and both of the two circular hollow shafts are communicated with the inside of the first cavity;

[0025] Communication holes are respectively provided on both sides of the third cavity corresponding to the circular hollow shafts, and the two circular hollow shafts are respectively arranged in the two communication holes. The third cavity rotates relative to the first cavity through the two circular hollow shafts.

[0026] Furthermore, a convex circular cavity is formed on the surface of the first cavity, and a magnet is arranged inside the convex circular cavity for fixing a device to be charged attached to the convex circular cavity.

[0027] Implementing the embodiments of the present invention has the following beneficial effects:

[0028] In the embodiments of the present invention, through the positional relationship and connection relationship among the first cavity, the second cavity and the third cavity included in the wireless charger, it is ingeniously realized that the wireless charger occupies a small position when being stored, and when in use, it enters a state where three charging modules work simultaneously and do not interfere with each other through rotation. Moreover, protective measures are taken during rotation to limit the rotation angle, and the power connection line will not be damaged due to excessive rotation. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 It is a schematic diagram of the storage state of the wireless charger provided by the embodiments of the present invention;

[0031] Figure 2 It is a schematic diagram of the use state of the wireless charger provided by the embodiments of the present invention;

[0032] Figure 3 It is a schematic diagram of the use state of the wireless charger provided by the embodiments of the present invention;

[0033] Figure 4 It is an assembly structure diagram of the wireless charger provided by the embodiments of the present invention;

[0034] Figure 5 It is an exploded view of the wireless charger provided by the embodiments of the present invention;

[0035] Figure 6It is a schematic diagram of the second cavity provided by an embodiment of the present utility model;

[0036] Figure 7 It is a schematic diagram of the structure of the limit groove and the rotating shaft hole provided by an embodiment of the present utility model;

[0037] Figure 8 It is an assembly schematic diagram of the second cavity provided by an embodiment of the present utility model;

[0038] Figure 9 It is an assembly structure schematic diagram of the first cavity provided by an embodiment of the present utility model;

[0039] Figure 10 It is a schematic diagram of the structure of the fixed shaft provided by an embodiment of the present utility model;

[0040] Figure 11 It is a schematic diagram of the structure of the snap ring provided by an embodiment of the present utility model;

[0041] Figure 12 It is an assembly structure schematic diagram of the fixed shaft and the fixing piece provided by an embodiment of the present utility model;

[0042] Figure 13 It is a schematic diagram of the structure of the fixing piece provided by an embodiment of the present utility model. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0044] Here, it should also be noted that in order to avoid obscuring the present utility model due to unnecessary details, only the structures and / or processing steps closely related to the solution according to the present utility model are shown in the drawings, while other details less related to the present utility model are omitted.

[0045] As Figures 1 to 3 shown, the embodiments of the present utility model provide a schematic diagram of the storage state and a schematic diagram of the use state of a wireless charger.

[0046] The wireless charger includes three cavities, namely the first cavity 1, the second cavity 2, and the third cavity 3. A charging module is built into each cavity. For the first cavity 1 and the second cavity 2, they respectively have a first inclined surface 11 and a second inclined surface 21. The first inclined surface 11 and the second inclined surface 21 are mutually attached, and the attachment includes complete attachment and partial attachment. Complete attachment means that the first inclined surface 11 and the second inclined surface 21 are all attached to each other, and partial attachment means that the first inclined surface 11 and the second inclined surface 21 are partially attached to each other, and there is still a part exposed outside. As Figures 1 to 3 In the state of, the first inclined surface 11 and the second inclined surface 21 are both completely attached. Figure 1 In, the wireless charger is in a storage state (without considering the third cavity 3). Figure 2 And Figure 3 In, the wireless charger is in a use state (without considering the third cavity 3), or it can be called a folded state. From the state change to Figure 1 During the state change to Figure 2 During the state change from Figure 2 During the state change to Figure 1 During the state change, the first inclined surface 11 and the second inclined surface 21 rotate relative to each other. Therefore, the first inclined surface 11 and the second inclined surface 21 are only partially attached.

[0047] Referring to Figures 4 to 5 , a hollow rotating shaft 12 is provided on the first inclined surface 11, and the hollow rotating shaft 12 protrudes from the first inclined surface 11. Referring to Figure 6 It can be seen that a rotating shaft hole 22 that cooperates with the hollow rotating shaft 12 is provided on the second inclined surface 21; it should be noted that it is also possible to set the hollow rotating shaft 12 on the second inclined surface 21 and the rotating shaft hole 22 on the first inclined surface 11, which does not limit the present invention. The reason for setting the hollow rotating shaft 12 to be hollow is that in one scheme, a device for fixing the two inclined surfaces passes through the hollow rotating shaft 12 to axially fix the two inclined surfaces. In another scheme, when the first inclined surface 11 and the second inclined surface 21 adopt other fixing schemes, that is, the fixing device does not pass through the hollow rotating shaft 12, but a conductive connecting member, that is, a connecting wire for connecting the two charging modules, is arranged inside the hollow rotating shaft 12.

[0048] Combined with Figure 6 And Figure 7As can be seen, the aforementioned rotating shaft hole 22 is a stepped hole. The rotating shaft hole 22 includes a large hole wall 222 located at the upper part, a small hole wall 221 located at the lower part, and a step surface 223 located between the large hole wall 222 and the small hole wall 221. The hollow rotating shaft 12 is arranged against the large hole wall 222 and the step surface 223. That is to say, the hollow rotating shaft 12 will not enter the small hole. The purpose is to make the axial fixation more convenient and firm later, and also to make the first inclined surface 11 and the second inclined surface 21 fit more closely. Optionally, the rotating shaft hole 22 can also be a through hole.

[0049] Combined with Figures 8 to 11 , the first inclined surface 11 and the second inclined surface 21 rotate relative to each other through the hollow rotating shaft 12 during the rotation of the rotating shaft hole 22. However, the hollow rotating shaft 12 and the rotating shaft hole 22 also need to be axially fixed. The fixing device includes a fixing shaft 51 and a circlip 52. The fixing shaft 51 includes a fixing cap 53 and a fixing rod 54. The fixing rod 54 is arranged in the hollow rotating shaft 12. An annular groove 56 is arranged at one end of the fixing rod 54 away from the fixing cap 53. The circlip 52 is arranged in the annular groove 56. At this time, the lower edge 25 of the small hole wall 221 is flush with the annular groove 56. Therefore, the circlip 52 is against the lower edge 25 of the small hole wall 221 and cooperates with the fixing shaft 51 to axially fix the hollow rotating shaft 12 and the rotating shaft hole 22, that is, to fix the first inclined surface 11 and the second inclined surface 21 in the direction perpendicular to the two inclined surfaces.

[0050] Since there are charging modules in both the first cavity 1 and the second cavity 2, a conductive connecting piece is required between the first cavity 1 and the second cavity 2. Therefore, a hollow hole 55 penetrating the fixing cap 53 and the fixing rod 54 is arranged on the fixing shaft 51, that is, the fixing device is internally provided with a hollow hole 55, and the hollow hole 55 is used to accommodate the conductive connecting piece.

[0051] The circlip 52 is a ring with an opening. Three inwardly protruding fixing bumps 521 are arranged at intervals on the inner ring of the ring. The circlip 52 cooperates with the annular groove 56 to axially fix the first inclined surface 11 and the second inclined surface 21. The purpose of arranging three fixing bumps 521 is to make the fixation between the fixing shaft 51 and the circlip 52 more firm.

[0052] Although the cooperation between the fixing shaft 51 and the circlip 52 is tight, the circlip 51 still has the risk of falling off. Another alternative solution is referred to Figures 12 to 13, The fixing device includes a fixing shaft 51 and a fixing piece 9. The fixing shaft 51 includes a fixing cap 53 and a fixing rod 54. The fixing rod 54 is arranged in the hollow rotating shaft 12. An annular groove 56 is arranged at one end of the fixing rod 54 far from the fixing cap 53. The fixing piece 9 includes a fixing handle 91 and a fixing bayonet 93. A fixing hole 92 is arranged on the fixing handle 91 for fixing with the second inclined surface 21. A fixing groove 94 is arranged on the fixing bayonet 93. The bottom of the fixing groove 94 is semicircular, and two relatively parallel sides are arranged at the upper part of the fixing groove 94. The annular groove 56 is clamped in the fixing groove 94 to cooperate with the first inclined surface 11 and the second inclined surface 21 for fixing. A hollow hole 55 penetrating through the fixing cap 53 and the fixing rod 54 is also arranged on the fixing shaft 51 for accommodating the conductive connecting piece.

[0053] Alternatively, the fixing device includes a fixing shaft 51 and a nut. The fixing shaft 51 includes a fixing cap 53 and a fixing rod 54. The fixing rod 54 is arranged in the hollow rotating shaft 12. A thread is arranged at one end of the fixing rod 54 far from the fixing cap 53. The snap ring 52 is replaced by a nut. It is also possible to axially fix the first inclined surface 11 and the second inclined surface 21 by the cooperation of the fixing rod 51 and the nut. However, this solution occupies more space and the fixing firmness is not as good as using the snap ring 52 and the fixing piece 9. In this alternative solution, a hollow hole 55 penetrating through the fixing cap 53 and the fixing rod 54 is also arranged on the fixing shaft 51.

[0054] The first cavity 1 and the second cavity 2 can rotate relative to each other. However, there is a conductive connecting piece connected between the two cavities. The continuous mutual rotation of the two does not achieve the necessary function and will cause the conductive connecting piece to be repeatedly twisted and entangle, resulting in a use failure. Therefore, a limiting piece 13 protruding from the first inclined surface 11 and a limiting groove 23 matching with the limiting piece 13 are respectively arranged on the first inclined surface 11 and the second inclined surface 21. Figure 5 The limiting piece 13 is arranged close to the hollow rotating shaft 12. In practice, the two can be arranged separately, and the first limiting piece 13 can be arranged on the second inclined surface 21, while the limiting groove 23 is arranged on the first inclined surface 11 relatively. However, considering the manufacturing cost and the convenience of manufacturing and installation, the hollow rotating shaft 12 and the limiting piece 13 are arranged on one inclined surface, and the rotating shaft hole 22 and the limiting groove 23 are arranged on the other inclined surface.

[0055] This paragraph does not discuss the situation of the third cavity 3. From Figure 1 state to Figure 2 state, the second cavity 2 needs to rotate clockwise by 180 degrees; the second cavity 2 rotates counterclockwise by 180 degrees from Figure 2 return to Figure 1For the state of the wireless charger, in order to control the rotation angle within 180 degrees, the cross-section of the limit groove 23 is semi-circular. The limiting member 13 includes two first horizontal edges 132 and second horizontal edges 133 arranged in parallel. When the wireless charger is in the storage state, the first inclined surface 11 and the second inclined surface 21 are completely attached. The second horizontal edge 133 is attached to the diameter of the semi-circle. Rotate the second cavity 2 clockwise by 180 degrees, and the wireless charger is in the folded state. The first inclined surface 11 and the second inclined surface 21 are completely attached again, and the first horizontal edge is attached to the diameter of the semi-circle.

[0056] The limiting member 13 and the limit groove 23 cooperate with each other to limit the rotation amplitude, but it cannot ensure the relative stability between the first inclined surface 11 and the second inclined surface 21 in the storage state or the folded state. In order to ensure the relative stability between the first inclined surface 11 and the second inclined surface 21 in the storage state or the folded state, positioning marbles are provided on the limiting member 13, and two positioning holes 24 that cooperate with the positioning marbles are symmetrically arranged in the limit groove 23. When the first inclined surface 11 and the second inclined surface 21 are completely attached, the positioning marbles are located in the positioning holes 24.

[0057] In the embodiment of the present invention, a receiving hole 131 is provided on the limiting member 13 for receiving the positioning marble 81 with a positioning post. The positioning post is located in the receiving hole 131, and the positioning marble slightly protrudes outside the limiting member 13 and enters the positioning hole 24 in the storage state or the folded state. The positioning marble is located in one positioning hole 24 in the storage state and in the other positioning hole 24 in the folded state to maintain the stability of the storage state or the folded state.

[0058] For the same purpose as the positioning marbles and the positioning holes 24, first magnet holes 14 are symmetrically arranged on the left and right sides of the first inclined surface 11. Magnets 6 are embedded in the first magnet holes 14, that is, two magnets 6 are embedded in the first inclined surface 11 symmetrically. Second magnet holes 25 are also symmetrically arranged on the left and right sides of the second inclined surface 12, and magnets 6 are also embedded in the second inclined surface 21. When the first inclined surface 11 and the second inclined surface 21 are completely attached, the magnets 6 on the first inclined surface 11 and the magnets 6 on the second inclined surface 21 exactly correspond. That is, the magnets 6 are used to maintain the stable state when the first inclined surface 11 and the second inclined surface 21 are completely attached.

[0059] Such as Figures 2 to 5, the wireless charger includes a third cavity 3 with a built-in charging module. A groove 4 for accommodating the third cavity 3 is provided on the first cavity 1. Circular hollow shafts 71 are respectively provided on two opposite groove walls 41 in the groove 4, and both of the two circular hollow shafts 71 communicate with the inside of the first cavity 1; Communication holes 72 are respectively provided on both sides of the third cavity 3 corresponding to the circular hollow shafts 71, and the two circular hollow shafts 71 are respectively arranged in the two communication holes 72, and the third cavity 3 rotates relative to the first cavity 1 through the two circular hollow shafts 71.

[0060] For the third cavity 3, due to the limitation of the position and shape of the groove 4, its rotation angle is itself limited. The conductive connection member between the first cavity 1 and the third cavity 3 can be safely arranged in the middle of the circular hollow shaft 71 without worrying about the problem of damage to the conductive connection member caused by its rotation.

[0061] A convex circular cavity 15 is formed on the surface of the first cavity 1, and a magnet is built in the convex circular cavity 15 to fix the device to be charged on the convex circular cavity 15. Figure 3 In the shown usage state, generally the mobile phone is attached to the first cavity 1, the wireless earphone is placed on the upper surface of the second cavity 2, and the watch is hung on the third cavity 3, and the three are wirelessly charged at the same time, which is very convenient to use. When not in use, it can be neatly stored and is easy to store.

[0062] It should be noted that in this article, relational terms such as first, second, and third are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the element.

[0063] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A wireless charger, characterized in that: The wireless charger comprises a first cavity and a second cavity respectively containing a charging module, the first cavity and the second cavity respectively having a first inclined surface and a second inclined surface, the first inclined surface and the second inclined surface being in contact with each other, wherein the first inclined surface is provided with a hollow rotating shaft protruding from the first inclined surface, and the second inclined surface is provided with a rotating shaft hole rotating in cooperation with the hollow rotating shaft; The first inclined surface and the second inclined surface are respectively provided with limiters protruding from the first inclined surface A member and a limiting groove cooperating with the limiting member; A fixing device for fixing the hollow shaft and the shaft hole in the axial direction is provided in the hollow shaft, and a hollow hole is built in the fixing device, and the hollow hole is used to accommodate a conductive connecting piece connecting the charging module in the first cavity and the charging module in the second cavity.

2. The wireless charger according to claim 1, characterized in that: The shaft hole is a stepped hole, comprising a large hole wall at the top, a small hole wall at the bottom, and a step surface between the large hole wall and the small hole wall; The hollow rotating shaft is arranged close to the wall of the large hole and the step surface.

3. The wireless charger according to claim 1, wherein: The cross section of the limiting groove is semicircular, and the limiting member includes two parallel first horizontal edges and a second horizontal edge; When the first inclined surface is completely in contact with the second inclined surface, the first horizontal edge or the second horizontal edge is in contact with the diameter of the semicircle.

4. The wireless charger according to claim 3, characterized in that: The limiting member is provided with a positioning marble, and the limiting groove is symmetrically provided with two positioning holes cooperating with the positioning marble; When the first inclined surface is completely in contact with the second inclined surface, the positioning marble is located in the positioning hole.

5. The wireless charger according to claim 1, wherein: Magnets are symmetrically arranged on both left and right sides of the first inclined surface and the second inclined surface, and the magnets embedded in the first inclined surface and the magnets embedded in the second inclined surface are arranged correspondingly when the first inclined surface and the second inclined surface are completely fitted together.

6. The wireless charger according to claim 1, wherein: The fixing device comprises a fixing shaft and a retaining spring; The fixed shaft comprises a fixed cap and a fixed rod, and the fixed shaft has the hollow hole penetrating the fixed cap and the fixed rod, the fixed rod is arranged in the hollow rotating shaft, and an annular groove is arranged on one end of the fixed rod away from the fixed cap; The retaining ring is arranged in the annular groove and is close to the lower edge of the hole wall of the small hole. The fixed shaft cooperates with the retaining ring to fix the hollow rotating shaft and the rotating shaft hole in the axial direction.

7. The wireless charger according to claim 6, characterized in that: The clamping spring is a circular ring with an opening, and at least three inwardly protruding fixing convex points are arranged at intervals on the inner ring of the circular ring.

8. The wireless charger according to claim 1, wherein: The fixing device comprises a fixing shaft and a fixing sheet; The fixed shaft comprises a fixed cap and a fixed rod, and the fixed shaft has the hollow hole penetrating the fixed cap and the fixed rod, the fixed rod is arranged in the hollow rotating shaft, and an annular groove is arranged on one end of the fixed rod away from the fixed cap; The fixing plate includes a fixing handle and a fixing bayonet, wherein the fixing handle is provided with a fixing hole for fixing with the second inclined surface, and the fixing bayonet is provided with a fixing groove, the bottom of the fixing groove is semicircular, and the upper part of the fixing groove is provided with two relatively parallel edges; The annular groove is clamped in the fixing groove and fixed.

9. The wireless charger according to claim 1, wherein: The wireless charger also includes a third cavity with a built-in charging module; The first cavity is provided with a groove for accommodating the third cavity, and circular hollow shafts are respectively provided on two opposite groove walls of the groove, and the two circular hollow shafts are both communicated with the interior of the first cavity; The third cavity is provided with connecting holes on both sides corresponding to the circular hollow shafts, and the two circular hollow shafts are respectively arranged in the two connecting holes. The third cavity is rotated relative to the first cavity through the two circular hollow shafts.

10. The wireless charger according to claim 1, wherein: A raised circular cavity is formed on the surface of the first cavity, and a magnet is built into the raised circular cavity for fixing the device to be charged on the raised circular cavity.

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