| 摘要 |
PURPOSE:To facilitate the fixing work to a wind shield and to ensure the fixed state all the time regardless of the change in thermal expansion of the wind shield, by forming a supporting member of a liquid detector with a material whose refractive index is the same as the refractive index of a front glass for light and coefficient of thermal expansion is the same as the cefficient of thermal expansion of the front glass. CONSTITUTION:In order to attach a liquid detector 20 to a front glass 10, a light emitting element 24 and a light receiving element 25 are assembled to both protruded parts 23a and 23b of a supporting member 23, a thin reflecting plate 22 is stuck to the lower surface of a supporting member 21, and the lower surface of the supporting member 23 is bonded to the upper surface of the supporting member 21. Then the supporting member 21 for the liquid detector 20 is bonded to a front glass inner surface 12 through the thin reflecting plate 22 at a lower surface 21a. Thereafter, the supporting member 23 is coated by a cover 16. At this time, even though the glass 10 is changed by the thermal expansion due to the ambient temperature, the supporting member 21 follows the change in thermal expansion of the glass 10 since the member has approximately the same coefficient of thermal expansion as that of the glass 10. Therefore, the lower surface 21a of the supporting member 21 is always closely bonded to the front glass inner surface 12. |
