Direction switching valve unit and cough assisting device using the same

A cough assisting device, comprising

• a case body (100) having an inhaling space (110) formed on and passing through a lower surface thereof;
• an air pressure generating unit (200) provided in the case body (100), the air pressure generating unit generating an air pressure through a rotation force for suctioning air into an air inlet (210) and discharging suctioned air via an air outlet (220);
• a direction switching valve unit (300) provided in the inhaling space (110) formed in the case body (100), the direction switching valve unit converting a flow direction of the air for forcedly suctioning air toward a patient's respiratory organ or forcedly discharging air from a patient's respiratory organ by means of air pressure generated in the air pressure generating unit (200);
• a connecting port (140) secured to and passing through the case body (100), the connecting port communicating with a mask hose (150) through one side thereof;
• and
• a relaying hose (400) provided in the case body (100) and communicating with the other side of the connecting port (140) and the direction switching valve unit (300) through both ends thereof;
• wherein the direction switching valve unit (300) comprises
• a housing (310) provided in the inhaling space (110) formed in the case body (100) and having a receiving space (311) formed on an upper surface thereof, a first vertical passage (312) formed for communicating the inhaling space (110) with the receiving space (311), a second vertical passage (313) formed for communicating the receiving space (311) with an air inlet (210) of the air pressure generating unit (200), a first horizontal passage (314) formed for communicating the receiving space (311) with the relaying hose (400), a second horizontal passage (315) formed for communicating the receiving space (311) with an air outlet (220) of the air pressure generating unit (200), and a third horizontal passage (316) formed for communicating the first vertical passage (312) with an opened portion of the upper surface;
• a receiving body (330) fixed in the receiving space (311) of the housing (310) and having communication ports (331) formed at and penetrating locations corresponding to four (4) opened portions of the receiving space (311);
• a rotating body (340) placed on the receiving body (330), the rotating body having an upper plate (341), a lower plate (342) and first and second partitions (343) and (344) connecting the upper plate (341) and the lower plate (342) to form a first direct passage (345), a second direct passage (346) and a third direct passage (347), both sides of each of the direct passages being opened;
• and
• a two-directional motor (350) provided at an upper side of the housing (310) and connected to a shaft of the rotating body (340).