INJECTION DEVICE PROVIDED WITH A DOSING UNIT PRODUCING A CLICK SOUND
The invention relates to an injection device for injecting respectively selectable amounts of fluid from an ampulla, preferably insulin. A manual actuation device comprises an axially displaceable operating head (8) which can be displaced exclusively in a (rear) rest position, a tubular-shaped drive element (11) which is rotationally fixed to the operating head, a guiding element (24) which is fixed in an axial and rotational manner and an output element (9, 19) which is displaceable in an axial direction and which is rotationally secured inside the device and is provided in order to drive the plunger (5) of the ampulla (4). A rotational grid (20) is provided between the rotational and non-rotational parts of the injection device and produces acoustic sounds, for example, click sounds, when the operating head is rotated, corresponding to an adjusted dose. According to the invention, the rotational grid is constructed in such a way that the operating head (8) is accidentally rotated too much in one direction of rotation, the extra large dose can be reduced by simply rotating the operating head in a reverse direction. Audible acoustic sounds can also be produced during re-rotation, enabling the patient to determine the adjusted dose by hearing.