CN220043064U - Stackable multi-cascade wireless charger - Google Patents

Abstract

The utility model relates to a stackable multi-cascade wireless charger, which comprises a circuit board, a plurality of side surfaces, a top surface and a bottom surface, wherein the top surface and/or the bottom surface of the stackable multi-cascade wireless charger are/is respectively provided with a longitudinal electric connection structure, the longitudinal electric connection structure comprises a surface contact assembly, the surface contact assembly is provided with a conductive contact piece and a magnetic piece positioned on the inner side of the conductive contact piece, the conductive contact piece and the magnetic piece are correspondingly combined into a whole, the conductive contact piece is elastically and electrically connected to the circuit board, and the surface contact assembly is respectively exposed on the corresponding surface to be connected with another stackable multi-cascade wireless charger and/or be connected with an external electric device to form a multi-cascade structure. The surface contact assembly surface and the surface electrical contact of the longitudinal electrical connection structure are combined with each other to form magnetic attraction connection, the structures can be interconnected and electrically communicated, so that various combinations can be carried out, the functions are diversified, the carrying is convenient, great convenience is brought to users, and the device has a wide application prospect.

Description

Stackable multi-cascade wireless charger

Technical Field

The utility model relates to the technical field of wireless charging, in particular to a stackable multi-cascade wireless charger.

Background

Currently, mobile phones have become the most commonly used consumer electronics products for people's life, and mobile payment in particular is a great convenience for users. Moreover, more and more functions of the mobile phone are performed, and various video or entertainment functions are accelerating power consumption, which makes higher demands on the capacitance of the mobile phone. However, even the latest mobile phones can only support two days at a time, and the duration is limited. Thus, the charger for supplying electricity becomes an indispensable electronic component of the mobile phone.

In order to facilitate carrying and avoid the trouble of various data lines, the current charging products are gradually turned to a wireless charging mode, and as the wireless charging does not need to be provided with a data line with a corresponding interface, the charging requirements of various brands of mobile phones or tablet computers and the like can be met only by one wireless charger, thereby being greatly convenient for users and becoming an important trend of future development.

The conventional wireless charger is usually in a charging seat structure, for example, chinese patent publication No. CN217282240U discloses a multifunctional wireless charger, which comprises a bracket, a charging support part and a charging assembly, wherein the bracket is a plate-shaped bending structure body and comprises a bending part and a bottom plate, the bending part and the bottom plate are bent to form an acute angle, the charging support part is movably arranged at the rear side of the bracket, the charging assembly is embedded in the charging support part, and a sliding support assembly is movably arranged at the front side of the bracket and used for supporting a charged communication terminal. The charger adopts the bending support, has compact structure, convenient use, stability, safety, low cost, energy conservation and environmental protection, is suitable for electronic products with various sizes, and provides more flexible selection when a user charges. However, the whole support structure is inconvenient to carry after all, and each functional part cannot be detached for independent use although products such as watches, earphones and the like can be charged at the same time.

Disclosure of Invention

Therefore, the stackable multi-cascade wireless charger has the advantages of diversified function combinations, compact structure, convenience in carrying and use and reliable electric contact.

The utility model provides a but many cascades of folding wireless charger, includes circuit board, a plurality of side, top surface and bottom surface, but many cascades of folding wireless charger's top surface and/or bottom surface are equipped with vertical electric connection structure respectively, vertical electric connection structure includes the face contact assembly, the face contact assembly has conductive contact piece and is located the inboard magnetic part of conductive contact piece, conductive contact piece and magnetic part correspond to combine in an organic wholely, conductive contact piece elasticity electricity is connected in the circuit board, the face contact assembly exposes in the surface that corresponds respectively in order to be connected and switch on with another many cascades of folding wireless charger and/or with outside power consumption device and form many cascades.

Preferably, the conductive contact piece comprises a surface contact piece and a connecting piece which are integrally connected, the top surface and/or the bottom surface of the stackable multi-cascade wireless charger are respectively provided with a through hole so as to expose the surface of the surface contact piece, the exposed surface of the surface contact piece is used as a conductive contact surface, and the connecting piece is elastically and electrically connected to the circuit board.

Preferably, the surface contact piece wraps the surface of the magnetic piece, the conductive contact piece is a bent or curved elastic piece, the connecting piece has elasticity, the connecting piece is in a sheet shape or a spring shape, and the conductive contact piece extends from a contact point of the circuit board to the edge.

Preferably, the magnetic pieces on the same side comprise positive magnetic pieces and negative magnetic pieces which are arranged side by side, wherein a magnetic piece is respectively arranged on the inner side of each positive magnetic piece, a magnetic piece is respectively arranged on the inner side of each negative magnetic piece, the magnetic pieces on the same side are one magnetic piece corresponding to each magnetic piece or two or more magnetic pieces corresponding to each magnetic piece, the thickness of the conductive contact piece at the part wrapping the outer surface of each magnetic piece is 0.2-0.5 mm, and each conductive contact surface has a preset area to provide 1A-20A current.

Preferably, the surface contact assembly is provided with a top contact assembly exposed on the top surface of the wireless charger and a bottom contact assembly exposed on the bottom surface of the wireless charger, the top contact assembly and the bottom contact assembly respectively protrude out of the top surface and the bottom surface of the circuit board, the top contact assembly and the bottom contact assembly respectively correspond to a conductive contact piece and a magnetic piece, a pair of the top contact assembly and the bottom contact assembly respectively have one magnetic piece or share one magnetic piece, and the conductive contact pieces of the top contact assembly and the bottom contact assembly are electrically connected with each other.

Preferably, each stackable multi-cascade wireless charger further comprises a transverse electric connection structure, the transverse electric connection structure comprises a left contact assembly and a right contact assembly which are exposed on two opposite sides, the left contact assembly comprises a left magnetic attraction piece and a left magnetic attraction piece, the right contact assembly comprises a right magnetic attraction piece and a right magnetic attraction piece, the outer surface of the left magnetic attraction piece is provided with a left conductive contact surface, the outer surface of the right magnetic attraction piece is provided with a right conductive contact surface, and the stackable multi-cascade wireless charger is connected with another stackable multi-cascade wireless charger or an external electric device on the side through the corresponding conductive contact surfaces and is conducted.

Preferably, each magnetic element is a magnet or a magnetizable element, the left magnetic element is located at the inner side of the left magnetic element, the right magnetic element is located at the inner side of the right magnetic element, and the corresponding magnetic elements are parallel to each other.

Preferably, the foldable multi-cascade wireless charger is internally provided with at least one of a wireless charging module, a Bluetooth sound box module, a light module and a watch charging module, and is internally provided with at least one magnetic alignment piece so as to align the foldable multi-cascade wireless chargers when being overlapped.

Preferably, the foldable multi-cascade wireless charger is internally provided with a containing cavity, the upper edge of the containing cavity is provided with an elevation support body, the elevation support body is rotatably connected to one side of the charger through a rotating shaft in a page-turning mode, the surface of the elevation support body is provided with a positioning structure for placing any foldable multi-cascade wireless charger, and the elevation support body is internally provided with a circuit board or a wireless charging circuit board.

Preferably, the foldable multi-cascade wireless charger is provided with a touch switch, the touch switch comprises a touch piece and a switch element, the switch element is communicated with the wireless charging circuit and is used as a switch of the wireless charging circuit, the touch switch is provided with an elastic part for elastically supporting the touch piece, and the touch piece presses the elastic part to conduct the switch element when being pressed.

The stackable multi-cascade wireless charger is provided with the longitudinal electric connection structure, the surface contact assembly of the longitudinal electric connection structure is provided with the conductive contact piece and the magnetic piece, and the surface contact assembly is respectively exposed out of the corresponding surface to be connected with another stackable multi-cascade wireless charger and/or an external electric device and conducted to form the multi-cascade structure. From this the electrical property is through the contact between face and the face when switching on, and the structure can interconnect and the electrical intercommunication to can carry out multiple combination, wireless charger can make the charger of different functions, for example, have wireless function of charging, can also have multiple functions such as bluetooth speaker, earphone charge, wrist-watch charge, little night-light simultaneously, increase wireless charger's availability factor, improve customer experience sense and viscidity. Moreover, the magnetic attraction piece and the magnetic piece are matched with each other, so that the structure is compact. When not in use, the magnetic attraction piece is attracted with the magnetic piece, so that the magnetic piece is close to the magnetic attraction piece. When the multi-cascade wireless charger is used, the magnetic pieces on two sides of the multi-cascade wireless charger are attracted to each other, so that the respective conductive contact surfaces are in close contact, and the reliability of electrical connection is improved. Meanwhile, a combination body can be formed by sequentially laminating through magnetic attraction, so that the portable magnetic attraction type magnetic attraction device is convenient to carry, brings great convenience to users and has a wide application prospect.

Drawings

Fig. 1 is a schematic perspective view of a foldable multi-cascade wireless charger according to an embodiment of the utility model.

Fig. 2 is a perspective exploded view of the wireless charger of fig. 1.

Fig. 3 is a schematic view of portion a of fig. 2.

Fig. 4 is a schematic perspective view of a wireless charger according to a second embodiment of the present utility model.

Fig. 5 is a perspective exploded view of the wireless charger of fig. 4.

Fig. 6 is a schematic perspective exploded view of a wireless charger according to a third embodiment of the present utility model.

Fig. 7 is a schematic cross-sectional structure of the wireless charger of fig. 6.

Detailed Description

The present utility model will be described in detail with reference to specific embodiments and drawings.

Referring to fig. 1, 2 and 3, a stackable multi-cascade wireless charger 10 according to an embodiment of the present utility model includes a circuit board 31, a plurality of side surfaces 101, a top surface 102 and a bottom surface 103, wherein the top surface 102 and/or the bottom surface 103 of the stackable multi-cascade wireless charger are respectively provided with a longitudinal electrical connection structure, the longitudinal electrical connection structure includes a surface contact assembly 20, the surface contact assembly 20 includes a conductive contact piece 21 and a magnetic member 22 located inside the conductive contact piece 21, the conductive contact piece 21 and the magnetic member 22 are correspondingly combined into a whole, the conductive contact piece 21 is elastically and electrically connected to the circuit board 31, and the surface contact assembly 20 is respectively exposed on the corresponding surfaces to be connected and conducted with another stackable multi-cascade wireless charger and/or an external electrical device to form a multi-cascade structure.

As shown in fig. 3, each of the conductive contact pieces 21 preferably includes a surface contact piece 211 and a connecting member 212 integrally connected, and the top surface 102 and/or the bottom surface 103 of the stackable multi-cascade wireless charger are respectively provided with a through hole 203 to expose a surface of the surface contact piece 211, the exposed surface of the surface contact piece 211 serves as a conductive contact surface 220, and the connecting member 212 is elastically and electrically connected to the circuit board 31. The conductive contact surfaces 220 slightly protrude from the surface by magnetic attraction when in contact with each other.

Preferably, the surface contact piece 211 wraps the surface of the magnetic piece 22, the conductive contact piece 21 is a bent or curved elastic piece, the connecting piece 212 has elasticity, the connecting piece 212 is in a sheet shape or a spring shape, and the conductive contact piece 21 extends from a contact point of the circuit board 31 to the edge. Specifically, the connector 212 may be L-shaped, Z-shaped, or the like, which imparts a certain elasticity while being capable of extending outward from the circuit board 21.

In some embodiments, the magnetic elements 22 on the same side include positive magnetic elements 262 and negative magnetic elements 261 arranged side by side, wherein one magnetic element is respectively arranged on the inner side of each positive magnetic element 262, one magnetic element is respectively arranged on the inner side of each negative magnetic element 261, and the magnetic elements on the same side are one magnetic element corresponding to each magnetic element 22 or two or more magnetic elements corresponding to each magnetic element 22. The thickness of the conductive contact piece 21 at the position of coating the outer surface of the magnetic piece 22 is 0.2-0.5 mm, more preferably 0.3 mm. I.e., the thickness of the sheet-form connection 212 is less than 0.5 millimeters. However, when a sheet like copper sheet is used, the thickness can be made smaller than 0.2 mm. Each conductive contact surface 220 has a predetermined area to provide 1A-20A current, and the present embodiment can meet the power requirements of charging with large current above 5A. Because of the surface-to-surface contact, the embodiment is suitable for the power consumption requirement of larger current.

Specifically, the surface contact assembly 20 has a top contact assembly 201 exposed at the top surface 102 of the wireless charger and a bottom contact assembly 205 exposed at the bottom surface 103 of the wireless charger, the top contact assembly 201 and the bottom contact assembly 205 protrude from the top surface 102 and the bottom surface 103 of the circuit board 31, respectively, the top contact assembly 201 and the bottom contact assembly 205 have a conductive contact piece 21 and a magnetic piece 22, respectively, a pair of the top contact assembly 201 and the bottom contact assembly have one magnetic piece 22 or share one magnetic piece 22, respectively, and the conductive contact pieces 21 of the top contact assembly 201 and the bottom contact assembly are electrically connected to each other. A pair of the top contact assembly 201 and the bottom contact assembly 205 are mounted together by a bracket 281, respectively, and the magnetically attractable member may be housed within a cavity of the bracket. Preferably, a magnetic attraction member is further provided on the inner side of each magnetic member 22, or a pair of the magnetic members 22 of the top contact assembly 201 and the bottom contact assembly have a magnetic attraction member in common. The attraction force of the attracting magnetic members is set so that the magnetic members 22 and the conductive contact pieces 21 are attracted inside the through holes 203 when not in use, and when the magnetic members 22 of different devices are in face-to-face contact, the magnetic force between the magnetic members 22 is larger than that of the attracting magnetic members so as to be able to protrude out of the through holes 203 to be in contact with each other.

As shown in fig. 1 and 2, in some preferred embodiments, each of the stackable multi-cascaded wireless chargers further includes a lateral electrical connection structure 30, the lateral electrical connection structure 30 including a left contact assembly and a right contact assembly exposed at two opposite sides, the left contact assembly including a left magnet 23, a left magnet 26, the right contact assembly including a right magnet 27, a right magnet 28, the left magnet 26 having a left conductive contact surface and the right magnet 28 having a right conductive contact surface, the stackable multi-cascaded wireless charger 10 being laterally connected and electrically conductive to another stackable multi-cascaded wireless charger or to an external electrical device via the conductive contact surfaces on the corresponding sides. The left magnetic member 26 and the right magnetic member 28 are respectively covered with a conductive contact piece 263, and the conductive contact piece 263 is substantially the same as the conductive contact piece 21 described above. The left and right conductive contact surfaces are exposed surfaces of the conductive contact piece 263, respectively. Thus, the lateral electrical connection structure 30 is substantially identical to the longitudinal electrical connection structure and principle, but oriented differently, or mounted in slightly different positions and configurations.

Specifically, the stackable multi-cascade wireless charger 10 has an upper cover 208 and a lower cover 207, where at least two sides 101 of the upper cover 208 are respectively provided with two or more through holes 202 so as to expose corresponding conductive contact surfaces. The surface of the upper cover 208, i.e., the top surface 102, is provided with two or more through holes 203, respectively, so as to expose corresponding conductive contact surfaces 220. The surface of the lower cover 207, i.e., the bottom surface 103, is provided with two or more through holes 203, respectively, so as to expose the corresponding conductive contact surfaces 220.

Specifically, each magnetic member 22, 26, 28 is a magnet or a magnetizable element, the left magnetic member 23 is located on the inner side of the left magnetic member 26, the right magnetic member 27 is located on the inner side of the right magnetic member 28, the right magnetic member 22 is located on the inner side of the right magnetic member, and the respective magnetic members 22 are parallel to each other. Similarly, the attraction force of the left and right attracting magnetic members 23, 27 is set so that the magnetic members 26, 28 and the conductive contact piece 21 are attracted inside the through hole 203 when not in use, and when the magnetic members 26, 28 of different devices are in face-to-face contact, the magnetic force between the magnetic members 26, 28 is larger than that of the attracting magnetic members so as to be able to extend out of the through hole 202 to be in contact with each other.

In a specific application, further, the foldable multi-cascade wireless charger is internally provided with at least one of a wireless charging module, a Bluetooth sound box module, a light module and a watch charging module, and the foldable multi-cascade wireless charger is internally provided with at least one magnetic alignment piece 29 so as to align when the foldable multi-cascade wireless chargers are overlapped.

In the second embodiment of the present utility model, as shown in fig. 4 and 5, the foldable multi-cascade wireless charger 10a is a general multifunctional charging stand, and a wireless charging module is built in the general multifunctional charging stand. The foldable multi-cascade wireless charger is internally provided with a containing cavity 15, the upper edge of the containing cavity 15 is provided with an elevation support 18, the elevation support 18 is connected to one side of the charger through a rotating shaft 181 in a page-turning type rotating manner, the surface of the elevation support 18 is provided with a positioning structure for placing any one of the foldable multi-cascade wireless chargers, and a circuit board or a wireless charging circuit board 31 is arranged in the elevation support 18.

Specifically, the elevation support 18 has a housing 183, and the housing 183 is provided with a positioning structure for placing any one of the side contact power utilization units 20. Specifically, the positioning structure is a middle protruding portion, and when the positioning structure is used in cooperation with the stackable multi-cascade wireless charger 10 of the first embodiment, a corresponding recess is provided at the bottom of the charger 10 to combine with the protruding portion, so as to perform an alignment function. The charger 10 is preferably magnetically fixed to the surface of the elevation support 18, and is electrically connected to the charger 10a through a longitudinal electrical connection structure on the bottom surface. In a specific embodiment, the elevation support 18 has a circuit board 182 and/or a wireless charging circuit board 184 built-in, the circuit board or the wireless charging circuit board being provided with a longitudinal electrical connection 38 to the charger 10. The longitudinal electrical connection structure 38 of the charger 10a includes a second magnetic attraction piece 384, a second magnetic piece 385, and a second conductive piece 386, respectively. The second magnetic attraction piece 384, the second magnetic piece 385 and the second conductive piece 386 are basically the same as the aforementioned magnetic attraction piece, the magnetic piece and the conductive contact piece, and the structure and principle thereof are not described herein.

Similarly, the charger 10a is internally provided with a circuit board 31, at least two sides of the circuit board 31 are respectively provided with a transverse electric connection structure, and the transverse electric connection structure 30 in the charger 10 is basically the same, and also includes a left magnetic attraction member 311, a right magnetic member 321, a right magnetic attraction member 312 and a right magnetic member 322, which are not described herein again.

Fig. 6 and 7 illustrate a third embodiment of the present utility model, which provides a further stackable multi-cascaded wireless charger 10b, the structure and principle of the stackable multi-cascaded wireless charger 10b being substantially identical to the stackable multi-cascaded wireless charger 10, except that the stackable multi-cascaded wireless charger 10b has a wireless charging coil 362 and a trigger switch 40. The touch switch 40 includes a touch member 41 and a switch element 42, the switch element 42 is communicated with the wireless charging circuit 36 and is used as a switch of the wireless charging circuit 36, the touch switch 40 has an elastic portion to elastically support the touch member 41, and the touch member 41 presses the elastic portion to turn on the switch element 42 when pressed.

In addition, the elastic part comprises an extraction strip 45 extending from two opposite sides of the touch piece 41, and the extraction strip 45 is two semicircular arc elastic strips surrounding the outer ring of the touch piece 41. The casing is provided with a through hole 205, the touch piece 41 is provided with a protruding part, the protruding part protrudes out of the through hole 205 to be touched to trigger the switch 40, the top of the switch element 42 protrudes upwards to be contacted with the touch piece 41 or is in an integrated structure, the touch piece 41 is connected to the elastic part, the touch piece 41 is in a key-shaped structure, the bottom edge of the touch piece 41 transversely extends and is provided with an edge, the edge of the touch piece 41 is clamped on the inner side of the through hole 205, and the edge is supported on the wireless charging circuit 36 when the touch piece 41 is pressed down. The trigger switch 40 is located at the center of the circuit board 36 so that the center of gravity of the mobile phone is directly and effectively applied to the trigger switch 40.

When the wireless charging device is used, the mobile phone presses the touch piece 41 and presses the switch element 42 downwards, the switch element 42 is in a closed state, the wireless charging circuit 351 receives the signal and feeds the signal back to the main control chip, the main control chip sends a control signal to the full-bridge power converter, and the full-bridge power converter is connected with the wireless charging coil 362 and adjusts the transmitting power of the wireless charging coil 362 to realize wireless charging. When the mobile phone is moved, the touch piece 41 returns, the switch element 42 is opened, the wireless charging coil 362 stops transmitting, the charging is realized and stopped at any time.

The above-mentioned stackable multi-cascade wireless charger is provided with a longitudinal electric connection structure, the surface contact assembly 20 of the longitudinal electric connection structure is provided with a conductive contact piece 211 and a magnetic piece 22, and the surface contact assembly 20 is respectively exposed on the corresponding surface to be connected and conducted with another stackable multi-cascade wireless charger 10, 10a, 10b and/or an external electric device to form a multi-cascade structure. From this the electrical property is through the contact between face and the face when switching on, and the structure can interconnect and the electrical intercommunication to can carry out multiple combination, wireless charger can make the charger of different functions, for example, have wireless function of charging, can also have multiple functions such as bluetooth speaker, earphone charge, wrist-watch charge, little night-light simultaneously, increase wireless charger's availability factor, improve customer experience sense and viscidity. Moreover, the magnetic attraction pieces and the magnetic pieces 22, 26 and 28 are matched with each other, so that the structure is compact. When not in use, the magnetic attraction pieces are attracted to the magnetic pieces 22, 26 and 28, so that the magnetic pieces 22, 26 and 28 are close to the magnetic attraction pieces. When the multi-cascade wireless charger is used, the magnetic pieces 22, 26 and 28 on two sides of the multi-cascade wireless charger attract each other, so that the respective conductive contact surfaces are in close contact, and the reliability of electrical connection is improved. Meanwhile, a combination body can be formed by sequentially laminating through magnetic attraction, so that the portable magnetic attraction type magnetic attraction device is convenient to carry, brings great convenience to users and has a wide application prospect.

It should be noted that the present utility model is not limited to the above embodiments, and those skilled in the art can make other changes according to the inventive spirit of the present utility model, and these changes according to the inventive spirit of the present utility model should be included in the scope of the present utility model as claimed.

Claims (10)

1. The utility model provides a but many cascades of folding wireless charger, includes circuit board, a plurality of side, top surface and bottom surface, its characterized in that, but many cascades of folding wireless charger's top surface and/or bottom surface are equipped with vertical electric connection structure respectively, vertical electric connection structure includes the face contact assembly, the face contact assembly has conductive contact piece and is located the inboard magnetic part of conductive contact piece, conductive contact piece and magnetic part are corresponding to combine in an organic wholely, conductive contact piece elasticity electricity is connected in the circuit board, the face contact assembly exposes in corresponding surface in order to be connected and switch on with another many cascades of folding wireless charger and/or with outside power consumption device respectively and form many cascades.

2. The stackable multi-cascading wireless charger of claim 1, wherein the conductive contact sheet comprises a surface contact sheet and a connecting piece which are integrally connected, the top surface and/or the bottom surface of the stackable multi-cascading wireless charger are respectively provided with a through hole so as to expose the surface of the surface contact sheet, the exposed surface of the surface contact sheet is used as a conductive contact surface, and the connecting piece is elastically and electrically connected to a circuit board.

3. The stackable multi-cascading wireless charger of claim 2, wherein the surface contact sheet covers the surface of the magnetic member, the conductive contact sheet is a bent or curved elastic member, the connecting member has elasticity, the connecting member is in a sheet shape or a spring shape, and the conductive contact sheet extends from a circuit board contact point to an edge.

4. The stackable multi-cascade wireless charger of claim 1, wherein the magnetic pieces on the same side comprise positive magnetic pieces and negative magnetic pieces which are arranged side by side, one magnetic piece is respectively arranged on the inner side of each positive magnetic piece, one magnetic piece is respectively arranged on the inner side of each negative magnetic piece, one magnetic piece corresponding to each magnetic piece or two or more magnetic pieces corresponding to each magnetic piece are arranged on the same side, the thickness of the conductive contact piece at the part wrapping the outer surface of each magnetic piece is 0.2-0.5 mm, and each conductive contact surface has a preset area to provide 1-20A current.

5. The stackable multi-cascading wireless charger of claim 1, wherein the face contact assembly has a top contact assembly exposed at a top face of the wireless charger and a bottom contact assembly exposed at a bottom face of the wireless charger, the top contact assembly and the bottom contact assembly respectively protrude from the top face and the bottom face of the circuit board, the top contact assembly and the bottom contact assembly respectively have a conductive contact piece and a magnetic piece, the top contact assembly and the bottom contact assembly respectively have one magnetic piece or share one magnetic piece, and the conductive contact pieces of the top contact assembly and the bottom contact assembly are electrically connected with each other.

6. The stackable multi-cascading wireless charger of claim 1, wherein each stackable multi-cascading wireless charger further comprises a transverse electrical connection structure comprising a left contact assembly and a right contact assembly exposed at two opposite sides, the left contact assembly comprises a left magnetic attraction piece and a left magnetic attraction piece, the right contact assembly comprises a right magnetic attraction piece and a right magnetic attraction piece, the left magnetic part is provided with a left conductive contact surface on the outer surface, the right magnetic part is provided with a right conductive contact surface on the outer surface, and the stackable multi-cascading wireless charger is laterally connected and conducted with another stackable multi-cascading wireless charger or an external electric device through the corresponding conductive contact surfaces.

7. The stackable multi-cascading wireless charger of claim 6, wherein each magnetic element is a magnet or a magnetizable element, the left side magnetic element is positioned on the inner side of the left side magnetic element, the right side magnetic element is positioned on the inner side of the right side magnetic element, and the respective magnetic elements are arranged in parallel with each other.

8. The stackable multi-cascade wireless charger of claim 1, wherein the stackable multi-cascade wireless charger has at least one of a wireless charging module, a bluetooth speaker module, a light module, and a watch charging module built therein, and wherein the stackable multi-cascade wireless charger has at least one magnetic alignment inside to align the stackable multi-cascade wireless chargers when stacked.

9. The foldable multi-cascade wireless charger of claim 2, wherein a containing cavity is arranged in the foldable multi-cascade wireless charger, an elevation support body is arranged at the upper edge of the containing cavity, the elevation support body is connected to one side of the charger through a hinge turning type rotation, a positioning structure for placing any one of the foldable multi-cascade wireless chargers is arranged on the surface of the elevation support body, and a circuit board or a wireless charging circuit board is arranged in the elevation support body.

10. The wireless charger of claim 1 wherein the wireless charger comprises a trigger switch, the trigger switch comprising a trigger member and a switch element, the switch element being in communication with the wireless charging circuit and acting as a switch for the wireless charging circuit, the trigger switch having an elastic portion for elastically supporting the trigger member, the trigger member pressing the elastic portion to turn on the switch element when pressed.