US Patent 10011251 Cleaning device for vehicle-mounted camera

An air passage and two lines of cleaning liquid paths are provided in a nozzle, and the air passage is bifurcated into two lines of distal end portions. A secondary tank is provided upstream of the cleaning liquid paths. A distal end portion of a cleaning liquid path and the distal end portion of the air passage are merged. When a compressed air is supplied to the air passage, the resulting air flow makes the inside of the secondary tank to be negative pressure. Thus, the cleaning liquid can be made into the form of a mist, and is suctioned, and the cleaning liquid in the form of a mist and the compressed air are mixed, whereby it is possible to clean a lens surface and to reduce the amount of cleaning liquid used.