| 摘要 |
The invention relates to road studs. Road studs of the types that are reflective and/or have light emitting diodes are generally effective but have the disadvantage that when they are dirty their efficiency is impaired. The object of the invention is to provide a means of cleaning a road stud lens surface, which objective is met by a road stud comprising a lens mounted in a socket with provision for vertical movement, sealing means between the lens and the internal wall of the socket, an air passageway connecting the lower end of the socket interior to an air tank, and an outlet from the air tank directed at the outer surface of the lens. |
