Inhaler and ejection head unit attachable to the inhaler

An inhaler for ejecting a medicine to allow inhalation thereof by a user, comprising:

• an air flow path that guides a medicine that is inhaled to a suction port accompanying inspiration by the user;
• an ejection head unit attachable to an inhaler main unit and comprising a plurality of ejection heads that include an element that generates energy for ejecting the medicine, and include a plurality of ejection nozzles through which the medicine is ejected by said element, each of said ejection heads having an inlet portion for supply of the medicine into said ejection head, and said ejection head unit being movable in a first direction to move successive ones of said ejection heads to an opening provided in one portion of said air flow path;
• positioning means for moving said ejection head unit in said first direction to position a single ejection head among said plurality of ejection heads at said opening;
• a reservoir for storing the medicine, said reservoir being a separate unit from the inhaler main unit and being attachable to the inhaler main unit, said reservoir having an outlet portion for supplying the medicine to one of said ejection heads of said ejection head unit when said reservoir is in a first position;
• and
• a moving means for moving said reservoir into said first position and thereby moving said outlet portion into communication with said one of said single ejection heads, and for subsequently returning said reservoir from said first position to a standby position in which said reservoir is spaced from said ejection head unit to take said reservoir and said one ejection head out of communication with each other, said moving means moving in a second direction different from said first direction to move said reservoir from said first position into said standby position,
• wherein said single ejection head ejects a medicine in a state in which said reservoir is positioned in said standby position.