| 摘要 |
PURPOSE: To make a ground surface fitting rivet type signal apparatus compact and increase mechanical strength. CONSTITUTION: A lens body for a ground surface fitting rivet type road signal is integrally formed of synthetic resin or glass. A recession 4 that can set light emission diodes 3a-3d with the optical axes placed vertically upward is formed at the lower part. The reflecting surface 5 inclined frontward at an angle αof 45 deg. or less to the vertical face so as to reflect the light radiated from the light emission diodes 3a-3d upward to the front is formed at the back part, and the radiating surface 6 inclined frontward at an angle β of 45 deg. or less to the horizontal face so as to refract the light reflected by the reflecting surface 5 and to radiate it frontward in the state of crawling on the ground surface is formed at the front part. |
