| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic flushing device for a urinal that has a small number of components, is hardly affected by disturbance light, and detects a user for certain.SOLUTION: A spreader 5 that ejects flushing water is disposed on an inner top surface of a urinal. A sensor head 7a of an ultrasonic sensor 7 is exposed on an opening 21b of a front cover 21 of the spreader 5, as a sensor for detecting a user. An ultrasonic wave is irradiated diagonally downward of the ultrasonic sensor 7, for detecting a human body. A vibration conveyance inhibitor 13, such as a packing, is disposed on an outer peripheral surface of a tubular body 12 into which the ultrasonic sensor 7 is fitted, for watertight sealing between the opening 21b of the cover and a sensor case 14 into which the ultrasonic sensor 7 is fitted. The spreader 5 has an electrical path 9 with the ultrasonic sensor 7 and a sensor drive substrate 8 installed on an upper side, and an outlet 17 from which flushing water is sprayed and a water flow passage 10 disposed on a lower side, for watertight partitioning.SELECTED DRAWING: Figure 4 |
