Wireless charging device

• US 9,620,972 B2
• Filed: 08/20/2014
• Issued: 04/11/2017
• Est. Priority Date: 12/10/2013
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Oh, Hyunseok, Lee, Byunghwa, Shin, Choonghwan
• Primary Examiner(s): Ngo, Brian
• Application Number:
  US14/463,749
• Publication Number:
  US 20150162767A1
• Time in Patent Office: 965 Days
• Field of Search: 320108
• CPC Class Codes: F21V 33/0004 Personal or domestic articles
• CPC Class Codes: G06F 1/1632 External expansion units, e.g. docking stations
• CPC Class Codes: H02J 2310/22 The load being a portable electronic device
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence
• CPC Class Codes: H04M 1/04 Supports for telephone transmitters or receivers
• CPC Class Codes: H04R 1/028 associated with devices performing functions other than acoustics, e.g. electric candles

Abstract

A wireless charging device disclosed herein includes a housing having a wireless charging module mounted therein, an upper cover covering an upper surface of the housing, the upper cover having screw holes formed on one surface thereof, screws inserted into the screw holes to couple the housing and the upper cover to each other, magnets inserted into the screw holes to overlap the screws, and a pad disposed to cover the upper cover, the pad having a terminal mounting surface.

Claims

1. A wireless charging device comprising:

a housing having a wireless charging module mounted therein;

an upper cover that covers an upper surface of the housing, the upper cover having screw holes formed on one surface thereof;

screws inserted into the screw holes to couple the housing and the upper cover to each other;

magnets inserted into the screw holes to overlap the screws;

a pad disposed to cover the upper cover, the pad having a terminal mounting surface; and

a shielding member configured to be disposed between the magnets and a plurality of light sources arranged to face between the adjacent magnets and having shielding walls each surrounding a part of a circumference of the plurality of light sources.

2. The wireless charging device of claim 1, wherein the screw holes comprise first and second screw holes formed in a first direction along an upper surface of the upper cover and spaced apart from each other.

3. The wireless charging device of claim 2, wherein the screw holes include third and fourth screw holes formed in a second direction along the upper surface of the upper cover and spaced apart from each other, the second direction intersecting with the first direction.

4. The wireless charging device of claim 3, wherein the first and second directions are orthogonal to each other.

5. The wireless charging device of claim 3, wherein the magnets provided in the screw holes correspond to magnets provided on the terminal,

the magnets provided in the first and second screw holes being configured to couple to the magnets on the terminal to align the terminal along the first direction, and

the magnets provided in the third and fourth screw holes being configured to couple to the magnets on the terminal to align the terminal along the second direction orthogonal to the first direction.

6. The wireless charging device of claim 4, wherein the terminal mounting surface is inclined toward the ground, and

wherein a thickness of the pad gradually decreases from both end portions in the second direction toward a central portion of the pad.

7. The wireless charging device of claim 6, wherein the pad includes an anti-slip member formed to cover at least part of the terminal mounting surface the anti-slip member being disposed along an edge of the pad.

8. The wireless charging device of claim 1, wherein the terminal mounting surface includes a gel layer that changes shape to correspond with a shape of the terminal when the terminal is placed.

9. The wireless charging device of claim 1, wherein the plurality of light sources emit light in different directions through a region in which the shielding walls are not formed and magnetic fields from the magnets are shielded by the shielding walls.

10. A wireless charging device comprising:

a housing having a wireless charging module mounted therein;

an upper cover that covers an upper surface of the housing, the upper cover having arcuate guide holes formed to be symmetrical to each other relative on a center thereof;

a pad disposed to cover the upper cover, the pad having hooks formed on a bottom surface of the pad and inserted into the guide holes to be coupled to the upper cover, and a terminal mounting surface formed on an upper surface of the pad, the upper surface being opposite the lower surface; and

a shielding member configured to be disposed between the magnets and a plurality of light sources arranged to face between the adjacent magnets and having shielding walls each surrounding a part of a circumference of the plurality of light sources.

11. The wireless charging device of claim 10, wherein each of the guide holes gradually increases in width from one end toward the other end.

12. The wireless charging device of claim 11, wherein each of the hooks includes protrusion members that extend from the bottom surface of the pad and inserted into the guide hole, the protrusion members being disposed to face each other.

13. The wireless charging device of claim 10, further comprising:

a light-emitting module disposed between the upper cover and the pad, and configured to emit light by interaction with the terminal placed on the mounting surface; and

a light-guide film disposed between the light-emitting module and the pad, and configured to emit light irradiated from the light-emitting module through a transparent member disposed along an outer edge thereof.

14. The wireless charging device of claim 13, wherein the light-emitting module includes:

at least one light source; and

a coil electrically connected to the at least one light source and surrounding the at least one light source.

15. The wireless charging device of claim 13, wherein the upper cover includes screw holes, and

wherein the wireless charging device further includes:

screws inserted into the screw holes to couple the housing and the upper cover to each other, and

magnets inserted into the screw holes over the screws, a lower surface of the magnets coupled to a top surface of the screws and an upper surface of the magnets provided near an opening of the screw holes.

16. The wireless charging device of claim 15, wherein a shield member is disposed between the screw holes and the light-emitting module to shield magnetic fields of the magnets.

17. The wireless charging device of claim 16, wherein the shield member is made of a ferrite material.

18. The wireless charging device of claim 10, wherein the housing includes speaker holes formed along a circumference of a bottom surface thereof.

19. The wireless charging device of claim 18, further including:

a speaker module disposed beneath the wireless charging module.

20. The wireless charging device of claim 19, wherein a resonance space is formed at one side of the speaker module within the housing to be connected to the speaker holes.