AIR FEED DEVICE, DIVING HELMET, DIVING JACKET, AND SHIP

摘要

An air feed device for feeding air to a diver diving under water. The air feed device comprises a first feed passage for feeding a breathing device with the air fed from a first air feed unit, a second feed passage for feeding a breathing regulator with the air fed from a second air feed unit, and a switching unit for switching the passage for feeding the air to the breathing regulator, from the first passage to the second passage when the air pressure fed from the first air feed passage becomes lower than a predetermined pressure.