| 摘要 |
A powder inhaler and a method of constructing the same, the powder inhaler comprising: an inhaler body (6) having an opening (10) therein; an inhalation unit (22) disposed in the inhaler body (6), the inhalation unit (22) comprising an inhalation channel (24) through which powder is in use inhaled; a dosing unit (16) for providing a dose of powder to the inhalation channel (24) disposed in the inhaler body (6) so as to be rotatable about the central axis thereof, wherein the dosing unit (16) comprises a central shaft (20) which is co-axial with the central axis of the inhaler body (6) and has a spiral groove or protrusion (46) on the end face thereof; and an indicating wheel (42) for providing an indication as to the usage of the inhaler disposed in the inhaler body (6), the indicating wheel (42) having a toothed periphery (44) for engaging the spiral groove or protrusion (46) on the shaft (20) and being disposed such that at least a part thereof is visible through the opening (10) and so as to be rotatable within a diametrical plane containing the central axis of the inhaler body (6); characterized in that one side surface of the indicating wheel (42) includes at least one indication which is representative of the usage of the inhaler and in that the inhaler body (6) includes a recess (48) in which the opening (10) is provided, the opening (10) allowing at least a part of the one side surface of the indicating wheel (42) to be viewed. |
