| abstract |
Inhaler counter ( 20 ) comprising a counter housing ( 390 ), a rocker arm ( 200 ) with a pawl ( 210 ), the rocker arm being pivotally supported by the housing and arranged to perform a rocker movement in response to a linear actuation motion, a return spring ( 220 ) for resetting the rocker arm, a ratchet wheel ( 230 ) engagable with the pawl to convert the movement of the rocker arm into an incremental rotational motion of an axle arrangement ( 240 ) advancing a display means ( 60 ), the axle arrangement further comprising a back rotation prevention means ( 280 ) in the form of a spring loaded friction brake and a worm gear, the display means comprising rotatable indicator means ( 120 ) with teeth that engage the worm-gear and a stationary scale. |