Sleep breathing assist device

A sleep breathing assist device comprising:

• an internal carrier comprising a first straight tube, a second straight tube, a bending tube, a first curve part, and a second curve part, wherein:
• an end of the first straight tube is connected to an end of the bending tube, and the first straight tube extends at a first direction from a first position where the first straight tube is connected to the bending tube;
• an end of the first curve part is connected to an end of the first straight tube relative to the bending tube, and the first curve part bends from a second position where the first curve part is connected to the first straight tube, and the first curve part bends along the first direction to a second direction, wherein at least one first groove is formed on the first curve part, and each of the at least one first groove extends at a direction from the second position to the other end of the first straight tube, and a first air guiding space is defined between the at least one first groove and the first curve part;
• an end of the second straight tube is connected to the other end of the bending tube, and the second straight tube extends at a third direction from a third position where the second straight tube is connected to the bending tube;
• and
• an end of the second curve part is connected to an end of the second straight tube relative to the bending tube, and the second curve part bends from a fourth position where the second curve part is connected to the second straight tube, and the second curve part bends along the third direction to a fourth direction, wherein at least one second groove is formed on the second curve part, and each of the at least one second groove extends at a direction from the fourth position to the other end of the second straight tube, and a second air guiding space is defined between the at least one second groove and the second curve part;
• and
• an external coating layer covering an outer edge of the internal carrier, wherein the external coating layer does not completely occupy the first air guiding space, and does not completely occupy the second air guiding space.