Stefan Bayer,Daniel Berning,Philippe Blank,Wolfgang Pelzer,Björn Wilden
申请号：
US14782622
公开号：
US20160045663A1
申请日:
2014.04.08
申请国别(地区):
US
年份:
2016
代理人:
摘要：
The present invention relates to a drive mechanism of a drug delivery device for setting and dispensing of a dose of a medicament, the mechanism comprising: —a housing (20), —a piston rod (120) to operably engage with a piston (14) of a cartridge (12) for displacing the piston (14) in a distal direction (1), —a dose indicating member (40) with a dose size information (48) thereon, connected to a spring element (100) and being rotatable in a dose incrementing direction (5) against the action of the spring element (100) for setting of a dose, —a drive wheel (130) operably engaged with the piston rod (120) for displacing the piston rod (120) in distal direction (1) for dose dispensing, —wherein the dose indicating member (40) is engageable with the drive wheel (130) during dose dispensing to transfer a driving force to the drive wheel (130) when driven by the relaxing spring element (100) in a dose decrementing direction (6).
