Diaphragm nasal breathing regulator

A diaphragm nasal breathing regulator comprising a nasal plug that includes:

• a cylinder surrounding and defining a channel that extends in an axial direction of said cylinder, that has a first opening and a second opening opposite to each other along the axial direction, and that includes a first channel section adjacent to said first opening and a second channel section adjacent to said second opening, where a radius of said second channel section is smaller than that of said first channel section, said cylinder including
• a first inner surface that surrounds and defines said first channel section,
• a second inner surface that surrounds and defines said second channel section and that has an edge opposite to said second opening, and
• a bearing surface that is connected to said edge of said second inner surface and that faces said first opening;
• a diaphragm disposed in said first channel section and formed with a through hole that extends through said diaphragm along the axial direction and that has a radius smaller than that of said second channel section, said diaphragm including
• a first surface and a second surface that are opposite to each other along the axial direction and that face said first opening and said second opening respectively,
• an inner surrounding side that defines said through hole, and
• an outer surrounding side that is opposite to said inner surrounding side in a radial direction perpendicular to the axial direction;
• and
• an engaging unit including a first engaging part that is formed on said first inner surface, and a second engaging part that is formed on said diaphragm and that movably engages said first engaging part in a manner where said diaphragm is movable relative to said bearing surface between an inhaling positon and an exhaling position;
• wherein, when said diaphragm is in the exhaling position, said second surface of said diaphragm rests on said bearing surface, and air can flow only through said first opening, said first channel section, said through hole, said second channel section, and said second opening, and
• wherein, when said diaphragm is in the inhaling position, said diaphragm is away from said bearing surface in the axial direction, and air can flow through said second opening, said second channel section, said through hole, said first channel section, a gap between said first inner surface and said outer surrounding side, and said first opening.