Inhaler and inhaler mouthpiece

An inhaler for generating aerosol inside an apparatus body and supplying the aerosol to outside of said apparatus body to allow a user to inhale the aerosol,

• said apparatus body including
• an aerosol generation portion including a reservoir portion storing liquid and an atomization portion atomizing liquid stored in said reservoir portion into spray particles and applying the atomized spray particles to outside air introduced into said apparatus body, and
• an aerosol lead-out portion including an aerosol lead-out opening leading the generated aerosol to outside of said apparatus body, a lead-out flow passage guiding the generated aerosol from said aerosol generation portion to said aerosol lead-out opening, and an exhalation discharge opening for discharging exhalation of the user introduced from said aerosol lead-out opening to said lead-out flow passage, wherein
• said aerosol lead-out portion at a part that defines said lead-out flow passage has a narrow portion, at a position where said exhalation discharge opening is provided, for reducing a cross section of said lead-out flow passage toward said aerosol lead-out opening, and
• said narrow portion is positioned on an inner side than said exhalation discharge opening, in a part of said aerosol lead-out portion where said exhalation discharge opening is provided.

An inhaler mouthpiece removably attached to an aerosol generation portion of an inhaler for leading aerosol generated in said aerosol generation portion to outside, comprising:

• an aerosol lead-out opening leading aerosol generated in said aerosol generation portion to outside;
• a lead-out flow passage guiding the generated aerosol from said aerosol generation portion to said aerosol lead-out opening;
• and
• an exhalation discharge opening for discharging exhalation of a user introduced from said aerosol lead-out opening to said lead-out flow passage,
• said lead-out flow passage including
• a first flow passage portion extending from said aerosol generation portion in a first direction in a state of being attached to said aerosol generation portion,
• a second flow passage portion extending in a second direction that crosses said first direction to reach said aerosol lead-out opening, and
• a corner flow passage portion joining said first flow passage portion and said second flow passage portion to each other, wherein
• a curvature portion is provided at a part that defines said corner flow passage portion by curving that wall surface which crosses a center line of said first flow passage portion, and
• said exhalation discharge opening is provided on a wall surface at a position circumferentially displaced from that wall surface on which said curvature portion is provided and that defines said second flow passage portion.

An inhaler mouthpiece removably attached to an aerosol generation portion of an inhaler for leading aerosol generated inside said aerosol generation portion to outside, comprising:

• an aerosol lead-out opening leading aerosol generated in said aerosol generation portion to outside;
• a lead-out flow passage guiding the generated aerosol from said aerosol generation portion to said aerosol lead-out opening;
• and
• an exhalation discharge opening for discharging exhalation of a user introduced from said aerosol lead-out opening to said lead-out flow passage, wherein
• a narrow portion is provided at a position where said exhalation discharge opening is provided, for reducing a cross section of said lead-out flow passage toward said aerosol lead-out opening, and
• said narrow portion is positioned on an inner side than said exhalation discharge opening, in a part where said exhalation discharge opening is provided.