| 摘要 |
PURPOSE:To attain ease of a car washing, by holding fixedly an ultrasonic wave oscillator to the prescribed position of a reflecting plate for ultrasonic wave transmission/receiving for a car and providing an arm having a cross section of an inverse triangle shape at the upper part of the reflecting plate so as to flow distributively water going upward along the reflecting plate. CONSTITUTION:The ultrasonic wave oscillator 2 is fixed to the rubber-made arm 3 of an inverse triangle shape and mounted in the bumper of a car, and the arm 3 is fitted with a parabola reflecting mirror 1 giving the directivity to the ultrasonic wave transmission and receiving. The cross section of the arm 3 fitted to the upper surface of the reflecting mirror 1 is taken as the inverse triangle shape, and the water invaded from the opening of the bumper via an ultrasonic guide is elevated in the direction A along the parabola plane of the reflecting mirror 1 and distributed into directions B, C with the arm 3 of the inverse triangle shape. Then, the water washing the car with a hose is flowed out so as to prevent the water from flowing into the inside of the oscillator 2. |
