CN210007480U - Rear shell of wireless charging electronic products - Google Patents
Rear shell of wireless charging electronic products Download PDFInfo
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- CN210007480U CN210007480U CN201920329684.8U CN201920329684U CN210007480U CN 210007480 U CN210007480 U CN 210007480U CN 201920329684 U CN201920329684 U CN 201920329684U CN 210007480 U CN210007480 U CN 210007480U
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- wireless charging
- rear shell
- charging coil
- backshell
- electronic product
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Abstract
The utility model discloses a kind of wireless backshell that charges electronic product, mould plastics body, wireless charging coil and shielding piece including the backshell, wireless charging coil and shielding piece are located respectively the backshell is moulded plastics originally internally, the shielding piece is close to the backshell is moulded plastics body internal surface and is set up, wireless charging coil is close to the surface setting of the backshell body of moulding plastics sets up wireless charging coil, shielding piece set up in electronic product's backshell, has saved electronic product's inner space effectively, and wireless charging coil, shielding piece and backshell are melted in the body, have strengthened the intensity of backshell.
Description
Technical Field
The utility model relates to an electronic product with wireless function of charging especially relates to kinds of wireless electronic product's that charges backshell.
Background
The wireless charging principle is similar to a transformer, namely, the wireless charging principle comprises two coils, wherein the coil at the transmitting end transmits electric energy through an electromagnetic field with the frequency of 110 kHz-400 kHz, and the coil at the receiving end receives the electromagnetic field at the transmitting end through an electromagnetic induction mode and then converts alternating current into direct current to charge a secondary battery.
A metal member such as a battery is generally present near the receiving-end coil, and when wireless charging is performed by electromagnetic induction, an eddy current is formed in the metal member. In order to shield these interferences, it is usually necessary to attach a shielding plate to the back of the receiving-end coil.
In the prior art, the receiving end coil and the shielding sheet are attached at , and then the side of the receiving end coil is attached to the inner side of the rear shell of the electronic product.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing types of backshells which can save the inner space of electronic products with wireless charging function.
In order to solve the technical problem, the utility model discloses a technical scheme be wireless electronic product's backshells that charge, including backshell injection moulding body, wireless charging coil and shielding piece are located respectively the backshell is moulded plastics originally internally, the shielding piece is close to the backshell is moulded plastics body internal surface setting, wireless charging coil is close to the surface setting of the backshell body of moulding plastics.
And , the wireless charging coil is a spiral coil formed by winding an enameled wire in a plane.
, the thickness of the wireless charging coil is 0.05-0.28 mm.
And , the number of turns of the wireless charging coil is 3-20 turns.
, the shield is made of soft magnetic material.
, the soft magnetic material is at least of soft magnetic ferrite, amorphous nanocrystalline, permalloy and silicon steel.
, the back shell injection molding body is made of at least materials of polycarbonate, polymethyl methacrylate and polyphenylene sulfide.
, the wireless charging coil and the shielding plate are injected into the rear shell injection molding body through the insert.
, a conductive piece electrically connected with the wireless charging coil is further arranged on the rear shell injection molding body.
, the conductive member is located on the inner surface of the injection molded body of the rear shell.
The beneficial effects of the utility model reside in that set up wireless charging coil, shielding piece in electronic product's backshell, saved electronic product's inner space effectively, wireless charging coil, shielding piece and backshell melt in the body, have strengthened the intensity of backshell.
Drawings
Fig. 1 is a cross-sectional view of a rear housing of a wireless charging electronic product according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a wireless charging coil in a rear housing of a wireless charging electronic product according to embodiment of the present invention;
fig. 3 is an enlarged view of detail a in fig. 2.
Description of reference numerals:
1. the back shell is injection molded with the body;
2. a wireless charging coil;
3. a shielding sheet;
4. and (4) enameled wires.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The utility model discloses the most crucial design lies in: the wireless charging coil and the shielding sheet are arranged in the rear shell of the electronic product, so that the internal space of the electronic product is effectively saved.
Referring to fig. 1 to 3, a rear shell of kinds of wireless charging electronic products includes a rear shell injection molding body 1, a wireless charging coil 2 and a shielding sheet 3, the wireless charging coil 2 and the shielding sheet 3 are respectively disposed in the rear shell injection molding body 1, the shielding sheet 3 is disposed near an inner surface of the rear shell injection molding body 1, and the wireless charging coil 2 is disposed near an outer surface of the rear shell injection molding body 1.
According to the above description, the beneficial effects of the utility model reside in that wireless charging coil, shielding piece set up in the backshell of electronic product, have saved electronic product's inner space effectively, wireless charging coil, shielding piece and backshell melt in the bodies, have strengthened the intensity of backshell.
, the wireless charging coil 2 is a spiral coil formed by winding an enameled wire 4 in a plane.
Known by the above description, the plane spiral coil that wireless charging coil adopted the enameled wire coiling to form compares in the wireless charging coil of FPC, and eddy current loss is littleer, and charge efficiency is higher.
, the thickness of the wireless charging coil 2 is 0.05-0.28 mm.
And , the number of turns of the wireless charging coil 2 is 3-20.
, the shield 3 is made of soft magnetic material.
, the soft magnetic material is at least of soft magnetic ferrite, amorphous nanocrystalline, permalloy and silicon steel.
, the rear shell injection molding body 1 is made of at least materials selected from polycarbonate, polymethyl methacrylate and polyphenylene sulfide.
, the wireless charging coil 2 and the shielding sheet 3 are injected into the rear shell injection molding body 1 through the insert.
, a conductive piece electrically connected with the wireless charging coil 2 is further arranged on the rear shell injection molding body 1.
, the conductive piece is located on the inner surface of the back shell injection molding body 1.
As can be seen from the above description, the induced current generated by the wireless charging coil is transmitted to the battery module of the electronic product through the conductive member.
Example
Referring to fig. 1 to 3, an embodiment of the present invention is a rear shell of wireless charging electronic products, including a rear shell injection molding body 1, a wireless charging coil 2 and a shielding plate 3, where the wireless charging coil 2 and the shielding plate 3 are respectively disposed in the rear shell injection molding body 1, the shielding plate 3 is disposed near an inner surface of the rear shell injection molding body 1, and the wireless charging coil 2 is disposed near an outer surface of the rear shell injection molding body 1.
The wireless charging coil 2 can adopt an FPC (flexible printed circuit) charging coil, but preferably, the wireless charging coil 2 is a spiral coil formed by winding an enameled wire 4 in a plane manner, and the number of strands of the enameled wire 4 is at least two; the cross section of the enameled wire 4 can be rectangular or circular; the thickness of the wireless charging coil 2 is 0.05-0.28 mm; the wireless charging coil 2 is at least 1 layer in the thickness direction, and the number of turns is 3-20 turns.
The shielding sheet 3 is made of soft magnetic materials, the soft magnetic materials are at least of soft magnetic ferrite, amorphous nanocrystalline, permalloy and silicon steel, the thickness of the shielding sheet 3 is 0.015-0.250 mm, preferably, the shielding sheet 3 is of a laminated structure, and layers are directly bonded through a high polymer material adhesive.
The rear shell injection molding body 1 is made of at least materials of polycarbonate, polymethyl methacrylate and polyphenylene sulfide, and the thickness of the rear shell injection molding body 1 is 0.4-2 mm.
Specifically, the wireless charging coil 2 and the shielding plate 3 are injected into the rear shell injection molding body 1 through insert molding (or called insert injection molding).
, a conductive member (not shown) electrically connected to the wireless charging coil 2 is further disposed on the injection molded body 1 of the rear shell, preferably, the conductive member is disposed on the inner surface of the injection molded body 1 of the rear shell.
To fully illustrate the advantages of the backshell provided by the present invention, the inventors produced sample and compared sample to sample two (i.e., the backshell of the prior art).
Sample , 4 strands of enameled wires 4 with rectangular cross sections are wound into a planar spiral wireless charging coil 2 by using a winding machine, the thickness of a copper wire in each enameled wire 4 is 0.095mm, the width of the copper wire is 0.240mm, the thickness of an insulating skin is 10 μm, layers of thermoplastic polyurethane are arranged on the surface of the insulating skin, the number of turns of the planar spiral coil is 12, the inner diameter is 22mm, and the outer diameter is 48 mm.
The shielding sheet 3 is a laminated composite structure made of 4 layers of nanocrystalline soft magnetic materials with the thickness of 20 mu m, a thermoplastic polyurethane film is arranged between the nanocrystalline layers, and the thickness of the film is 10 mu m; the total thickness of the shielding plate 3 is 0.11 mm.
The wireless charging coil 2 and the shielding sheet 3 are integrated in the rear shell of the mobile phone by adopting an insert injection molding (or called insert injection molding) technology, and the injection molding material is polycarbonate.
Sample two (i.e. the backshell of the prior art): the FPC coil was prepared with 12 turns, an inner diameter of 22mm, an outer diameter of 48mm, a copper thickness of 0.095mm, and a line width of 0.96 mm. And a cover film or the like is added to the mixture to make the total thickness of the mixture 0.21 mm.
The shielding sheet is a laminated composite structure made of 4 layers of nanocrystalline soft magnetic materials with the thickness of 20 mu m, a thermoplastic polyurethane film is arranged between the nanocrystalline layers, and the thickness of the film is 10 mu m; the total thickness of the shielding sheet is 0.11 mm.
A common injection molding technology is adopted to prepare the rear shell of the mobile phone, then the FPC coil is attached to the inner side of the rear shell of the mobile phone by pressure-sensitive adhesive, and then the shielding sheet is attached.
Performance testing
The thickness measurement, the flexural modulus test, and the wireless charging efficiency test were performed on sample and sample two, and the test results shown in table 1 were obtained.
Table 1 table of performance test results
| Thickness (mm) | Flexural modulus (GPa) | Wireless charging efficiency (%) | |
| Sample | 0.95 | 7.1 | 72.6％ |
| Sample No. 2 | 1.27 | 2.4 | 69.3％ |
As can be seen from the test results in Table 1, the thickness of the rear shell of the mobile phone manufactured by the utility model is thinner, thereby saving the internal space of the mobile phone; due to the reinforcing effect of the copper coil, the flexural modulus of the rear shell is remarkably increased, and the strength of the rear shell is enhanced. In addition, because the coil is wound by adopting a plurality of strands of enameled wires, the eddy current is obviously reduced, and the charging efficiency is improved.
To sum up, the utility model provides a backshells of electronic product with wireless function of charging set up wireless charging coil, shielding piece in electronic product's backshell, save electronic product inner space, and wireless charging coil, shielding piece and backshell melt in the body, have the reinforcing effect to the backshell, adopt the plane spiral coil of stranded enameled wire coiling to compare with FPC coil, have the effect that reduces eddy current loss, have improved wireless charging efficiency, and the technology environmental protection simultaneously.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (8)
- The rear shell of kinds of wireless charging electronic products is characterized by comprising a rear shell injection molding body, a wireless charging coil and a shielding sheet, wherein the wireless charging coil and the shielding sheet are respectively arranged in the rear shell injection molding body, the shielding sheet is close to the inner surface of the rear shell injection molding body, and the wireless charging coil is close to the outer surface of the rear shell injection molding body.
- 2. The rear shell of the wireless charging electronic product according to claim 1, wherein: the wireless charging coil is a spiral coil formed by winding an enameled wire in a plane.
- 3. The rear shell of the wireless charging electronic product according to claim 2, wherein: the thickness of wireless charging coil is 0.05 ~ 0.28 mm.
- 4. The rear shell of the wireless charging electronic product according to claim 2, wherein: the number of turns of the wireless charging coil is 3-20 turns.
- 5. The rear shell of the wireless charging electronic product according to claim 1, wherein: the shielding plate is made of soft magnetic material.
- 6. The rear shell of the wireless charging electronic product according to claim 1, wherein: the wireless charging coil and the shielding sheet are molded through the insert in the rear shell injection molding body.
- 7. The rear shell of the wireless charging electronic product according to claim 1, wherein: the rear shell injection molding body is further provided with a conductive piece electrically connected with the wireless charging coil.
- 8. The rear shell of the wireless charging electronic product according to claim 7, wherein: the conductive piece is positioned on the inner surface of the rear shell injection molding body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920329684.8U CN210007480U (en) | 2019-03-15 | 2019-03-15 | Rear shell of wireless charging electronic products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920329684.8U CN210007480U (en) | 2019-03-15 | 2019-03-15 | Rear shell of wireless charging electronic products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210007480U true CN210007480U (en) | 2020-01-31 |
Family
ID=69301476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920329684.8U Active CN210007480U (en) | 2019-03-15 | 2019-03-15 | Rear shell of wireless charging electronic products |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210007480U (en) |
-
2019
- 2019-03-15 CN CN201920329684.8U patent/CN210007480U/en active Active
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