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DRIVE MECHANISM FOR DRUG DELIVERY DEVICE
专利权人:
发明人:
申请号:
EP10752766.5
公开号:
EP2475411A1
申请日:
2010.09.03
申请国别(地区):
EP
年份:
2012
代理人:
摘要:
A drive mechanism for a drug delivery device, preferably for a pen-type injector, the mechanism comprises a spindle (6) movable in a first direction during a delivery step, a splined portion (5, 11) operatively coupled to the spindle (6), and retraction means (12, 15, 16, 17, 20) acting on the splined portion (5, 11) at least at the end of the delivery step. Thereby, that after the delivery step the spindle (6) and/or the splined portion (5, 11) is moved in a second direction contrary to the first direction, such that the whole drive mechanism is relieved from stresses.
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