Reflective road device

Abstract

A reflective road device includes a translucent body and a reflective layer. The translucent body is made of a tempered transparent material and includes a base portion and a bump portion. The bump portion is integrally formed with the base portion with the bump portion being provided on the upper surface of the base portion. The area enclosed by the upper edge of the base portion is larger than the area enclosed by the lower edge of the bump portion. The bump portion is provided with an oval arc at the lower edge in an incident direction of light emitted from a light source. The reflective layer is provided on the outside surface of the base portion of the translucent body whereby the light emitted by the light source enters the translucent body through the bump portion and is reflected by the reflective layer and emitted by the translucent body toward the light source.

1 . A reflective road device, comprising:
 a translucent body made of a tempered transparent material and provided with
 a base portion and 
 a bump portion integrally formed with the base portion and provided on an upper surface of the base portion, wherein an area enclosed by an upper edge of the base portion is larger than an area enclosed by a lower edge of the bump portion, a side surface of the bump portion is non-spherical, and the bump portion has a major axis and a minor axis with the major axis being positioned in an incident direction of a light emitted from a light source, and a ratio of length of the minor axis to length of the major axis ranging from 0.5 to 0.99, and the lower edge in the direction of the major axis is formed to be elliptical, and 
   a reflective layer provided on an outside surface of the base portion of the translucent body whereby the light emitted from the light source enters the translucent body through the bump portion and is reflected by the reflective layer and emitted toward the light source via the translucent body, wherein the light emitted from the light source focuses on the reflective layer, and the non-spherical side surface of the bump portion and the elliptical lower edge enable concentration of the light reflected by the reflective layer within a horizontally effective reflection angle span centralized in the major axis serving as 0° angle such that a reflective brightness of the light reflected by the reflective layer reaches a maximum at the major axis, and the horizontally effective reflection angle span is ±20°.   
     
     
         2 . (canceled) 
     
     
         3 . The reflective road device as claimed in  claim 2 , wherein the ratio of length of the minor axis to length of the major axis ranges from 0.7 to 0.99. 
     
     
         4 . The reflective road device as claimed in  claim 1 , wherein an uppermost surface of the bump portion is flat. 
     
     
         5 . The reflective road device as claimed in  claim 1 , wherein the translucent body is made of tempered glass. 
     
     
         6 . The reflective road device as claimed in  claim 1 , wherein the translucent body is made of polymethyl methacrylate. 
     
     
         7 . The reflective road device as claimed in  claim 1 , wherein the bump portion has a contour of a half capsule. 
     
     
         8 . The reflective road device as claimed in  claim 1 , wherein the base portion has a shape of a reversed truncated cone. 
     
     
         9 . The reflective road device as claimed in  claim 1 , wherein a lower surface of the base portion has a recessed portion. 
     
     
         10 . The reflective road device as claimed in  claim 9 , wherein the recessed portion has a plurality of ladder ring structures. 
     
     
         11 . The reflective road device as claimed in  claim 1 , wherein a direction identification mark is provided on the upper surface of the base portion for indicating the incident direction of the light. 
     
     
         12 . The reflective road device as claimed in  claim 1 , wherein a plurality of small protrusions are formed on at least one of the upper surface of the base portion, an upper surface of the bump portion and the side surface of the bump portion to increase frictional force. 
     
     
         13 . The reflective road device as claimed in  claim 1 , further comprising a base mount having a groove at an upper surface of the base mount, wherein the base mount has two guide rails extending parallelly in the incident direction of the light, and the translucent body is disposed in the groove. 
     
     
         14 . The reflective road device as claimed in  claim 13 , wherein two oblique surfaces are respectively provided at two ends of the guide rails and a stepped portion is provided at a lower surface of each of the guide rails. 
     
     
         15 . The reflective road device as claimed in  claim 13 , wherein the base mount further includes at least one rib and a plurality of grooves with the grooves being disposed between the rib and the guide rails. 
     
     
         16 . (canceled) 
     
     
         17 . The reflective road device as claimed in  claim 1 , wherein the horizontally effective reflection angle span ranges from ±2° to ±20°.