Mehran Mojarrad,Scott Robert Gibson,Adam Livingston
申请号：
US16620016
公开号：
US20200230313A1
申请日:
2018.07.03
申请国别(地区):
US
年份:
2020
代理人:
摘要：
An insertion/retraction mechanism for a drug delivery device is disclosed. The insertion/retraction mechanism includes a retraction hub, an insertion hub, an insertion/retraction mechanism housing, and a dual torsion spring system. The retraction hub includes a first primary rotational stop and a second primary rotational stop extending radially inwardly from an inside surface. The insertion hub is disposed inside the retraction hub and comprises a first complementary rotational stop and a second complementary rotational stop extending radially outwardly from an outside surface. The dual torsion spring system causes the first primary rotational stop and the second primary rotational stop to selectively engage the first complementary rotational stop and the secondary rotational stop, respectively, and further causes the retraction hub to rotate relative to the insertion/retraction mechanism housing as the insertion/retraction mechanism moves between an initial position, an inserted position, and a retracted position.
