Exterior component disposed on front surface of radar device of vehicle

Abstract

An exterior vehicle component includes a proximity member disposed along an outer perimeter of an electromagnetic wave transmission member provided at a center of the component which is disposed in front of a radar device. The proximity member includes a chromium-plated portion formed on its front surface which reflects an electromagnetic wave. The proximity member is formed of an acrylate-styrene-acrylonitrile resin or a modified polyphenylene oxide resin having an attenuation coefficient for electromagnetic wave transmission, which is equal to or greater than a predetermined value.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view of a front grill of an automobile;

FIG. 2 is an enlarged cross-sectional view of the electromagnetic wave transmission member and proximity member taken along a line 2-2 in FIG. 1 according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a relevant portion of the invention in FIG. 2; and

FIGS. 4A and 4B are diagrams which explain an influence exerted to an internal loss of an electromagnetic wave based on the thickness of an emblem.

Claims

1. An exterior component disposed on a front surface of a radar device of a vehicle and in an electromagnetic wave transmitting and receiving path located in front of the radar device mounted on the vehicle, the component comprising: an electromagnetic wave transmission member through which an electromagnetic wave passes; anda proximity member disposed along an outer perimeter of the electromagnetic wave transmission member and having a surface treated portion formed on a front surface thereof which reflects an electromagnetic wave,the proximity member being formed of a material having an attenuation coefficient for electromagnetic wave transmission equal to or larger than a predetermined value.

2. The component according to claim 1, wherein the proximity member is formed so that an intensity of the electromagnetic wave passing through a rear surface of the proximity member and reflected by the surface treated portion is emitted from the rear surface at a value equal to or less than that of an electromagnetic wave reflected directly from a rear surface of the electromagnetic wave transmission member.

3. The component according to claim 2, wherein the attenuation coefficient of the proximity member is set corresponding to a thickness of the proximity member.

4. The component according to claim 1, wherein the proximity member is formed of an acrylate-styrene-acrylonitrile resin.

5. The component according to claim 1, wherein the proximity member is formed of a resin containing carbon particles or titanium oxide.

6. The component according to claim 5, wherein the resin is a modified phenylene oxide resin.

7. The component according to claim 1, wherein the surface treated portion is metal plating or a metal coating.

8. The component according to claim 1, wherein the component is an emblem provided on a front grill of the vehicle.

9. The component according to claim 1, wherein the electromagnetic wave transmission member is defined by a first region and a second region formed on an outer perimeter of the first region, and wherein the proximity member is defined by a third region and a fourth region, the third region being formed on an outer perimeter of the second region and the fourth region being formed on an outer perimeter of the third region.

10. The component according to claim 9, wherein the surface treated portion overlaps a front surface of the third and fourth regions.

11. The component according to claim 10, wherein the surface treated portion is metal plating or a metal coating.

12. The component according to claim 11, wherein the metal plating and the metal coating comprise chromium.