CN216902507U - Wireless charging coil - Google Patents
Wireless charging coil Download PDFInfo
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- CN216902507U CN216902507U CN202220017467.7U CN202220017467U CN216902507U CN 216902507 U CN216902507 U CN 216902507U CN 202220017467 U CN202220017467 U CN 202220017467U CN 216902507 U CN216902507 U CN 216902507U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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Abstract
The utility model relates to the technical field of wireless charging, in particular to a wireless charging coil, which comprises a first coil, a second coil and an FPC (flexible printed circuit) substrate, wherein the FPC substrate is arranged between the first coil and the second coil; the first coil and the second coil are respectively formed on copper layers on two sides of the FPC substrate through etching, and the first coil and the second coil are respectively formed by winding at least two copper wires made through etching in a parallel winding mode; every circle have at least a set of electrically conductive hole on the copper wire, be provided with conductive structure in the conductive hole, the FPC base plate on correspond the position of conductive hole is provided with the via hole to allow first coil pass through conductive structure pass the via hole and stretch into in the conductive hole of second coil, realize leading to mutually with the second coil. The wireless charging coil provided by the utility model has good consistency and high standardization degree.
Description
Technical Field
The utility model relates to the technical field of wireless charging, in particular to a wireless charging coil.
Background
In recent years, with the gradual popularization of wearable devices, wireless charging of smart phones, and NFC functions, wireless charging technology is developing at an incredible speed and is expected to become a main trend of popularity. The existing wireless charging coil is generally formed by winding a plurality of strands around an induction coil, and generally by winding copper wires around a common axis. The existing multi-strand parallel winding coil implementation mode is limited by various conditions, such as strand number, wire outlet mode, coil shape and the like, so that the wireless charging coil is difficult to meet the requirements of high consistency and high standardization due to the limitation of the various conditions in the actual production process.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the technical problems to be solved by the utility model are as follows: the wireless charging coil is good in consistency and high in standardization degree.
In order to solve the technical problems, the utility model adopts the technical scheme that: a wireless charging coil includes a first coil and a second coil, and an FPC substrate disposed between the first coil and the second coil;
the first coil and the second coil are respectively formed on copper layers on two sides of the FPC substrate through etching, and the first coil and the second coil are respectively formed by winding at least two copper wires made through etching in a parallel winding mode;
every circle have at least a set of electrically conductive hole on the copper wire, be provided with conductive structure in the electrically conductive hole, the position that corresponds on the FPC base plate electrically conductive hole is provided with the via hole to allow first coil pass through conductive structure pass the via hole and stretch into the electrically conductive hole of second coil, realize leading to mutually with the second coil.
Wherein, the copper line includes first copper line and second copper line, first coil is by first copper line and second copper line and around winding shaping, two tip of first copper line and second copper line link to each other in order to form closed circuit, at least one the tip forms the end is drawn forth to wireless charging coil's first.
The winding structure also comprises a second leading-out end which is arranged on the first coil.
The copper wires also comprise a third copper wire, a fourth copper wire, a fifth copper wire, a sixth copper wire and a multi-strand seventh copper wire;
the second coil is formed by winding a third copper wire, a fourth copper wire, a fifth copper wire, a sixth copper wire and a plurality of strands of seventh copper wires;
the third copper wire and the fourth copper wire are positioned at the outer circumference of the second coil, the third copper wire is connected with one end of the fourth copper wire to form a third leading-out end, and the third leading-out end is connected with the first leading-out end through a conductive structure and a conductive hole;
the fifth copper wire and the sixth copper wire are positioned at the inner circumference of the second coil, one ends of the fifth copper wire and the sixth copper wire are connected to form a fourth leading-out end, and the fourth leading-out end is connected with the second leading-out end through a conductive structure and a conductive hole;
and the multiple strands of seventh copper wires are arranged between the fourth copper wires and the fifth copper wires at intervals along the radial direction of the second coil and are respectively connected with the corresponding first copper wires or second copper wires of the first coil through the conductive structures and the conductive holes.
Wherein the fourth lead-out extends from an inner circumference to an outer circumference of the second coil.
Each group of the conductive holes comprises two conductive holes which are arranged at intervals along the extension direction of the copper wire.
The utility model has the beneficial effects that: the first coil and the second coil which are formed by winding a plurality of strands of copper wires are obtained by etching, and compared with the traditional winding mode of a plurality of strands of copper wires, the consistency and the standardization of the first coil and the second coil can be effectively improved; simultaneously, because first coil and second coil all are made through the etching on the two sides copper layer of FPC base plate, consequently the FPC base plate that sets up between first coil and second coil can effectively avoid first coil and second coil to contact to carry out the connection of first coil and second coil through the combination of electrically conductive hole and conducting structure, can effectively save too much connection structure.
Drawings
Fig. 1 is a schematic structural diagram of a wireless charging coil according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first coil in accordance with an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a second coil according to an embodiment of the present invention.
Description of reference numerals: 1. a first coil; 11. a first lead-out terminal; 12. a second lead-out terminal; 13. a first copper wire; 14. a second copper wire; 15. a staggered structure; 2. an FPC substrate; 21. through the hole; 3. a second coil; 31. a third copper wire; 32. a fourth copper wire; 33. a fifth copper wire; 34. a sixth copper wire; 35. a seventh copper wire; 36. a third lead-out terminal; 37. a fourth lead-out terminal; 4. and a conductive hole.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 to 3, a wireless charging coil includes a first coil 1 and a second coil 3, and an FPC substrate 2 disposed between the first coil 1 and the second coil 3; the first coil 1 and the second coil 3 are respectively formed on copper layers on two sides of the FPC substrate 2 through etching, and the first coil 1 and the second coil 3 are respectively formed by winding at least two copper wires which are made through etching in a parallel winding mode; each circle of copper wire is provided with at least one group of conductive holes 4, conductive structures are arranged in the conductive holes 4, and through holes 21 are arranged at positions, corresponding to the conductive holes 4, on the FPC substrate 2, so that the first coil 1 can penetrate through the through holes 21 through the conductive structures and extend into the conductive holes 4 of the second coil 3, and conduction with the second coil 3 is achieved.
The two sides of the FPC substrate 2 are provided with copper layers, and the first coil 1 and the second coil 3 are respectively formed on the two sides of the FPC substrate 2 by etching the copper layers on the two sides. The first coil 1 and the second coil 3 are identical in shape and can be circular, quadrangular with round corners or any other shape. The conductive structure is preferably a continuous conductive layer formed in the conductive hole 4 through a copper plating process, and the connection strength among the first coil 1, the FPC substrate 2 and the second coil 3 in the wireless charging coil can be effectively enhanced while the connection between the first coil 1 and the second coil 3 is realized through the continuous copper plating process.
From the above description, the beneficial effects of the present invention are: the first coil 1 and the second coil 3 which are formed by winding a plurality of strands are obtained by etching, and compared with the traditional winding mode of a plurality of strands of copper wires, the consistency and the standardization of the first coil 1 and the second coil 3 can be effectively improved; meanwhile, the first coil 1 and the second coil 3 are both made by etching on copper layers on two sides of the FPC substrate 2, so that the FPC substrate 2 arranged between the first coil 1 and the second coil 3 can effectively avoid the first coil 1 and the second coil 3 from contacting, and the first coil 1 and the second coil 3 are connected through the combination of the conductive hole 4 and the conductive structure, so that excessive connection structures can be effectively omitted.
In an embodiment, the copper line includes first copper line 13 and second copper line 14, first coil 1 is by first copper line 13 and second copper line 14 and goes around the shaping, two tip of first copper line 13 and second copper line 14 link to each other in order to form closed circuit, at least one the tip forms wireless charging coil's first leading-out terminal 11. The first coil 1 further comprises a second lead-out terminal 12, and the second lead-out terminal 12 is arranged on the first coil 1 and is not connected with the first copper wire 13 and the second copper wire 14. The copper wires further comprise a third copper wire 31, a fourth copper wire 32, a fifth copper wire 33, a sixth copper wire 34 and a multi-strand seventh copper wire 35; the second coil 3 is formed by winding a third copper wire 31, a fourth copper wire 32, a fifth copper wire 33, a sixth copper wire 34 and a plurality of strands of seventh copper wires 35; wherein, the third copper wire 31 and the fourth copper wire 32 are located at the outer circumference of the second coil 3, the third copper wire 31 is connected with one end of the fourth copper wire 32 to form a third terminal 36, and the third terminal 36 is connected with the first terminal 11 through a conductive structure and a conductive hole 4; the fifth copper wire 33 and the sixth copper wire 34 are located at the inner circumference of the second coil 3, one ends of the fifth copper wire 33 and the sixth copper wire 34 are connected to form a fourth outlet 37, and the fourth outlet 37 is connected to the second outlet 12 through a conductive structure and a conductive hole 4; the plurality of strands of the seventh copper wires 35 are arranged between the fourth copper wires 32 and the fifth copper wires 33 at intervals in the radial direction of the second coil 3, and are respectively connected with the corresponding first copper wires 13 or second copper wires 14 of the first coil 1 through the conductive structures and the conductive holes 4.
Referring to fig. 2, each turn of the copper wire of the first coil 1 has a misalignment structure 15, such that the conductive holes 4 at two ends of the misalignment structure 15 are located on circumferences with different radii, respectively, and referring to fig. 3, the second coil 3 does not have the misalignment structure 15, such that the conductive holes 4 at two ends of the fifth copper wire 33, the sixth copper wire 34, and the seventh copper wire 35 are located on circumferences with the same radius, and therefore, two ends of the seventh copper wire 35 can be connected to the corresponding first copper wire 13 and the second copper wire 14, respectively, to form a closed loop between the first coil 1 and the second coil 3.
Preferably, the fourth lead-out 37 extends from the inner circumference to the outer circumference of the second coil 3. The second lead-out terminal 12 connected to the fourth lead-out terminal 37 can be flush with the first lead-out terminal 11 by extending the fourth lead-out terminal 37 from the inner circumference to the outer circumference of the second coil 3 for later wiring.
Preferably, each group of the conductive vias 4 includes two conductive vias 4 arranged at intervals along the extending direction of the copper wire.
The wireless charging coil provided by the utility model can be used for mobile charging of mobile equipment.
Example 1
Referring to fig. 1 to 3, a wireless charging coil includes a first coil 1 and a second coil 3, and an FPC substrate 2 disposed between the first coil 1 and the second coil 3;
the first coil 1 and the second coil 3 are respectively formed on copper layers on two sides of the FPC substrate 2 through etching;
each circle of copper wire is provided with at least one group of conductive holes 4, a continuous conductive layer formed by a copper plating process is arranged in each conductive hole 4, a through hole 21 is arranged at a position, corresponding to the conductive hole 4, on the FPC substrate 2, and the continuous conductive layer is continuously formed in the conductive hole 4 of the first coil 1, the through hole 21 and the conductive hole 4 of the second coil 3 respectively;
the copper wires comprise a first copper wire 13 and a second copper wire 14, the first coil 1 is formed by winding the first copper wire 13 and the second copper wire 14 in a parallel winding mode, two end parts of the first copper wire 13 and the second copper wire 14 are connected to form a closed loop, and the end part at the outer circumference of the first coil 1 forms a first leading-out end 11 of the wireless charging coil;
the first coil 1 further comprises a second leading-out end 12, and the second leading-out end 12 is arranged on the first coil 1;
the copper wires further comprise a third copper wire 31, a fourth copper wire 32, a fifth copper wire 33, a sixth copper wire 34 and a multi-strand seventh copper wire 35;
the second coil 3 is formed by winding a third copper wire 31, a fourth copper wire 32, a fifth copper wire 33, a sixth copper wire 34 and a plurality of strands of seventh copper wires 35;
the third copper wire 31 and the fourth copper wire 32 are located at the outer circumference of the second coil 3, the third copper wire 31 is connected with one end of the fourth copper wire 32 to form a third leading-out terminal 36, and the third leading-out terminal 36 is connected with the first leading-out terminal 11 through a conductive structure and a conductive hole 4;
the fifth copper wire 33 and the sixth copper wire 34 are located at the inner circumference of the second coil 3, one ends of the fifth copper wire 33 and the sixth copper wire 34 are connected to form a fourth outlet 37, and the fourth outlet 37 is connected to the second outlet 12 through a conductive structure and a conductive hole 4;
a plurality of strands of the seventh copper wires 35 are arranged between the fourth copper wires 32 and the fifth copper wires 33 at intervals along the radial direction of the second coil 3, and are respectively connected with the corresponding first copper wires 13 or second copper wires 14 of the first coil 1 through the conductive structures and the conductive holes 4;
the fourth lead-out 37 extends from the inner circumference to the outer circumference of the second coil 3;
every group the electrically conductive hole 4 contains two edges the electrically conductive hole 4 that copper line extending direction interval set up.
In summary, the first coil 1 and the second coil 3 formed by winding a plurality of strands are obtained by etching, and compared with the conventional winding manner of a plurality of strands of copper wires, the consistency and standardization of the first coil 1 and the second coil 3 can be effectively improved; meanwhile, the first coil 1 and the second coil 3 are both made by etching on copper layers on two sides of the FPC substrate 2, so that the FPC substrate 2 arranged between the first coil 1 and the second coil 3 can effectively avoid the first coil 1 and the second coil 3 from contacting, and the first coil 1 and the second coil 3 are connected through the combination of the conductive hole 4 and the conductive structure, so that excessive connection structures can be effectively omitted.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (6)
1. A wireless charging coil is characterized by comprising a first coil and a second coil, and an FPC substrate arranged between the first coil and the second coil;
the first coil and the second coil are respectively formed on copper layers on two sides of the FPC substrate through etching, and the first coil and the second coil are respectively formed by winding at least two copper wires made through etching in a parallel winding mode;
every circle have at least a set of electrically conductive hole on the copper wire, be provided with conductive structure in the conductive hole, the FPC base plate on correspond the position of conductive hole is provided with the via hole to allow first coil pass through conductive structure pass the via hole and stretch into in the conductive hole of second coil, realize leading to mutually with the second coil.
2. The wireless charging coil of claim 1, wherein the copper wire comprises a first copper wire and a second copper wire, the first coil is formed by the first copper wire and the second copper wire in a parallel winding manner, two ends of the first copper wire and the second copper wire are connected to form a closed loop, and at least one end forms a first outlet of the wireless charging coil.
3. The wireless charging coil of claim 2, further comprising a second lead out disposed on the first coil.
4. The wireless charging coil of claim 3, wherein the copper wire further comprises a third copper wire, a fourth copper wire, a fifth copper wire, a sixth copper wire, and a seventh copper wire of a plurality of strands;
the second coil is formed by winding a third copper wire, a fourth copper wire, a fifth copper wire, a sixth copper wire and a plurality of strands of seventh copper wires;
the third copper wire and the fourth copper wire are positioned at the outer circumference of the second coil, the third copper wire is connected with one end of the fourth copper wire to form a third leading-out end, and the third leading-out end is connected with the first leading-out end through a conductive structure and a conductive hole;
the fifth copper wire and the sixth copper wire are positioned at the inner circumference of the second coil, one ends of the fifth copper wire and the sixth copper wire are connected to form a fourth leading-out end, and the fourth leading-out end is connected with the second leading-out end through a conductive structure and a conductive hole;
and the multiple strands of seventh copper wires are arranged between the fourth copper wires and the fifth copper wires at intervals along the radial direction of the second coil and are respectively connected with the corresponding first copper wires or second copper wires of the first coil through the conductive structures and the conductive holes.
5. The wireless charging coil of claim 4, wherein the fourth lead-out extends from an inner circumference to an outer circumference of the second coil.
6. The wireless charging coil according to any one of claims 1 to 5, wherein each set of the conductive holes comprises two conductive holes spaced apart along the extension direction of the copper wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220017467.7U CN216902507U (en) | 2022-01-05 | 2022-01-05 | Wireless charging coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220017467.7U CN216902507U (en) | 2022-01-05 | 2022-01-05 | Wireless charging coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216902507U true CN216902507U (en) | 2022-07-05 |
Family
ID=82213959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220017467.7U Active CN216902507U (en) | 2022-01-05 | 2022-01-05 | Wireless charging coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216902507U (en) |
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2022
- 2022-01-05 CN CN202220017467.7U patent/CN216902507U/en active Active
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