NFC antenna assembly
An NFC antenna assembly is provided. One embodiment of the NFC antenna assembly disclosed herein includes: a metal plate defining a fitting aperture which penetrates through the metal plate in a thickness direction of the metal plate; a mounting sheet disposed in the fitting aperture; an insulating washer disposed in the fitting aperture and surrounding the mounting sheet; and an NFC antenna disposed on the mounting sheet, wherein the mounting sheet comprises a first through slot extended in a radial direction of the mounting sheet, and the metal plate comprises a second through slot extended from the fitting aperture to a periphery of the metal plate.
1. A NFC antenna assembly, comprising:
a metal plate defining a fitting aperture which penetrates through the metal plate in a thickness direction of the metal plate;
a mounting sheet disposed in the fitting aperture;
an insulating washer disposed in the fitting aperture and surrounding the mounting sheet; and
an NFC antenna disposed on the mounting sheet,
wherein the mounting sheet comprises a first through slot extended in a radial direction of the mounting sheet, and the metal plate comprises a second through slot extended from the fitting aperture to a periphery of the metal plate.
2. The NFC antenna assembly of claim 1 , wherein the mounting sheet comprises a mounting hole, and the first through slot is extended from the mounting hole to a periphery of the mounting sheet.
3. The NFC antenna assembly of claim 2 , wherein an inner periphery of the insulating washer is abutted against the periphery of the mounting sheet.
4. The NFC antenna assembly of claim 2 , wherein the first through slot is configured as an enlongated slot formed in a lower part of the mounting sheet and extended in an up and down direction, a lower end of the first through slot extending to a lower part of periphery of the mounting sheet, and an upper end of the first through slot extending to the mounting hole.
5. The NEC antenna assembly of claim 4 , wherein the second through slot is configured as an enlongated slot extended in a longitudinal direction of the first through slot, a lower end of the second through slot extending to the mounting hole, and an upper end of the second through slot extending to an upper part of the periphery of the metal plate.
6. The NFC antenna assembly of claim 4 , wherein the NFC antenna comprises:
an antenna coil, connected with the mounting sheet;
an antenna coil adhesive layer disposed between the antenna coil and the mounting sheet and configured to connect the antenna coil with the mounting sheet;
a ferrite coating disposed on the antenna coil; and
a ferrite coating adhesive layer disposed between the ferrite coating and the antenna coil and configured to connect the ferrite coating with the antenna coil.
7. The NFC antenna assembly of claim 6 , wherein the antenna coil further comprises a winding hole at a center of the antenna coil, and the winding hole overlaps with the mounting hole in the mounting sheet.
8. The NFC antenna assembly of claim 7 , wherein the NFC antenna further comprises:
a thin metal layer disposed between the antenna coil adhesive layer and the mounting sheet; and
a thin metal layer adhesive layer disposed between the thin metal layer and the mounting sheet and configured to connect the thin metal layer with the mounting sheet.
9. The NFC antenna assembly of claim 8 , wherein the thin metal layer comprises:
a through hole; and
a third through slot extended from the through hole to a periphery of the thin metal layer.
10. The NFC antenna assembly of claim 9 , wherein the winding hole at the center of the antenna coil overlaps with the mounting hole and the through hole.
11. The NFC antenna assembly of claim 9 , wherein the third through slot is configured as an enlongated slot extended in an up and down direction.
12. The NFC antenna assembly of claim 9 , wherein the third through slot is formed in an upper part of the thin metal layer, a lower end of the third through slot extending to the through hole, and an upper end of the third through slot extending to an upper part of the periphery of the thin metal layer.
13. The NFC antenna assembly of claim 9 , wherein the third through slot is extended in a longitudinal direction of the first through slot.
14. The NFC antenna assembly of claim 8 , wherein a thickness of the thin metal layer ranges from 10 μm to 100 μm.
15. The NFC antenna assembly of claim 8 , wherein an area of the thin metal layer is larger than an area of the fitting aperture, and the periphery of the thin metal layer is disposed on the metal plate and has an insulated connection with the metal plate.
16. The NFC antenna assembly of claim 15 , wherein the periphery of the thin metal layer exceeds a periphery of the fitting aperture by a length of 2 mm-15 mm.