Patent ID: 11872339
Assignee: AVITA CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A nasal mucus suction device for preventing backflow, comprising: an air pump comprising an intake tube and an outlet tube; and a head structure coupled to the intake tube and the outlet tube of the air pump, wherein the head structure has a nasal mucus suction inlet, a gas outlet and a channel defined between the nasal mucus suction inlet and the gas outlet, wherein the channel has a first channel section in communication with the nasal mucus suction inlet and a second channel section in communication with the gas outlet, wherein the first channel section has at least one mucus storage cavity and the second channel section is in communication with the intake tube and the outlet tube of the air pump, wherein the first channel section has an air channel and a nasal mucus channel and the second channel section is extended from the air channel to the gas outlet, wherein the second channel section has a noise reduction space being in communication with the outlet tube of the air pump; wherein the at least one mucus storage cavity comprises a first mucus storage cavity and a second mucus storage cavity; wherein the first channel section of the head structure comprises an inner cup, an outer cup, a cup lid, and a cup cover: wherein the inner cup has the first mucus storage cavity, which is in communication with the nasal mucus suction inlet; wherein the outer cup has the second mucus storage cavity, which is in communication with the intake tube of the air pump, and accommodates at least one part of the inner cup, so that nasal mucus overflowing from the first mucus storage cavity is accommodated in the second mucus storage cavity; wherein the cup lid has an opening and covers a cup edge of the inner cup; wherein the cup cover has a flow guidance tube and is coupled to the cup lid, so that while the flow guidance tube passes through the opening of the cup lid, the flow guidance tube guides nasal mucus from the nasal mucus suction inlet to flow into the first mucus storage cavity; wherein the flow guidance tube of the cup cover passing through the opening of the cup lid leaves a gap between the flow guidance tube and the cup lid, and another gap is formed between the inner cup and the outer cup; wherein the first channel section is arranged in a manner that, before flowing into the second mucus storage cavity, nasal mucus overflowing from the first mucus storage cavity flows through the gap between the flow guidance tube and the cup lid first, and then flows through the another gap between the inner cup and the outer cup.