Injection Pen with Mechanical Dose Display Comprising Large Ciphers

摘要

The present invention relates to an injection device (1) having a mechanical dose size display wherein a first scale drum (10) carrying a series of first ciphers (11) and a second scale drum (20) carrying a series of second ciphers (21) are both rotatel able and axially moveable relatively to a housing (2) of the injection device in such a way that one of the first ciphers (11) and one of the a second ciphers (21) appears simultaneously in a window provided in the housing (2) thereby informing the user of the set dose. Bothe the first scale drum (10) and the second drum (20) preferable carries five ciphers (11, 21) around one full circumferential perimeter. The ciphers (11, 21) are provided in different circumferential circles and/or helically provided.

主权项

1. An injection device for injecting multiple settable doses of a liquid drug having a mechanical dose size display, which injection device comprises:
a housing having a window for displaying the size of the set dose, a first scale drum carrying a series of first ciphers and surrounding a second scale drum carrying a series of second ciphers, both the first scale drum and the second scale drum being rotatable mounted relatively to the housing, a rotational dose setting member for transferring rotation to the second scale drum during dose setting and structure for transferring rotation from the second scale drum to the first scale drum, wherein, one of the first ciphers and one of the second ciphers are visible through the window at the same time, the second cipher being visible through an opening in the first scale drum and wherein, the first scale drum is helical guided via a helical track engagement such that the first scale drum move helically during rotation and the second scale drum is axially guided via an oscillating track engagement such that the second scale drum oscillates axially during rotation.