| 摘要 |
PURPOSE:To eliminate a part left unwashed by suppressing the upward scattering of washing water and to enhance washing efficiency, by forming the plane shape of the jet orifice opened to the end part of a cylindrical part into a structure having a special shape. CONSTITUTION:The washing water supplied to a vortex stream forming cavity part 7 is formed into water droplets by the water stream flowing out from a washing water jet orifice 6 and the high speed vortex stream divided by a drain edge 8 and formed in the vicinity of said jet orifice 6. At this time, since the drain edge 8 of the washing water jet orifice 6 is formed into a plane shape present at the thick wall internal position of a short cylindrical part 1 constituting a curved edge 9 and said jet orifice 6 is opened in the direction almost right-angled to the water passage of the short cylindrical part 1, the upward scattering of washing water is suppressed by the overhang of the drain edge 8 from the water passage and the action drawing down the upper edge part A of a jet pattern is developed by said protruded part. Therefore, the injection of washing water can be controlled to a thin and wide shape conforming to the surface shape of a super-wide-angle head lamp and the injection of water droplets is also controlled to enable uniform washing. |
