An oxygen mask is a device that transfers oxygen from a tank to a person's lungs. There are mainly medical oxygen masks and civil aviation oxygen masks, which play an important role in assisting the treatment of diseases and protecting the safety of flight attendants.

1. The oxygen mask falls down. Pull the mask down
2. Fix the rope on your head with one hand and put the oxygen mask over your nose and mouth with the other hand.
The oxygen mask is connected to the automatic connector through a long and thin rubber oxygen supply tube and bayonet joint. Oxygen flows continuously to the air storage bag of the mask. The air storage bag first stores gas and then can accommodate a certain amount of oxygen when it rises. A face-mounted intake valve allows oxygen to enter when the passenger inhales deeply to empty the air storage bag.
Improve the compliance rate of oxygen mask air tightness: The air tightness of oxygen mask is a key technical index of its oxygen supply performance, which directly affects flight safety. Raymam reported that of the 89 incidents in which the US Air Force lost consciousness in the air, 19 (21.3%) were due to hypoxia. Talbot analyzed 620 first-class accidents and attributed 30.3 percent to poor air tightness in masks. The British Air Force reported 400 incidents of hypoxia in flight over a 10-year period, of which 22 percent were oxygen mask leaks and 11 percent were oxygen mask unconnected to oxygen regulator. The Chinese Air Force flight unit also had a number of flight accidents caused by poor mask performance. It can be seen that the air tightness of oxygen masks is the key to ensure the safety of oxygen supply to pilots. To improve the compliance rate of air tightness, mainly through the face mask design, peripheral seal design, hanging system design and dynamic air tightness design in engineering design.