Dry powder drug-dosing device

A dry powder drug-dosing device, at least comprising a flow passage member, a drug powder storage container and a drug-dosing metering component, and said flow passage member containing a mouthpiece and a flow passage element, the dry powder drug-dosing device characterized by:

• a housing constituted by an upper body and a lower body;
• an inverted conical drug powder storage container disposed in an upper part of the housing;
• an annular manual rotation portion disposed outside the upper part of the housing;
• a rotational slide passage disposed on an outer surface of the upper part of the housing and a sliding block disposed at an inner side of the annular manual rotation portion correspondingly;
• a first elastic member disposed in a cavity between the annular manual rotation portion and the upper part of the housing;
• a gas inlet disposed at an end of the rotational slide passage;
• the flow passage member disposed in the housing;
• the mouthpiece disposed on an outside of the housing and a mouthpiece cap disposed on the outside of the mouthpiece;
• a head end of said flow passage element connecting to the gas inlet, a tail end of the flow passage element connecting to the mouthpiece via an air channel, and a horizontal portion of the flow passage member having an opening as a drug inlet;
• a drug-dosing metering component disposed below the inverted conical drug powder storage container;
• and
• said flow passage element connected to the gas inlet, the drug-dosing metering component and the mouthpiece in sequence via the air channel.