主权项 |
1. A medicament dispensing mechanism configured to eject successive doses of the medicament from a medicament chamber, comprising:
a housing; a plunger rod configured for ejecting the doses of medicament from the chamber; and an actuation mechanism that comprises a trigger associated with the housing and having a ready position and a fired position with respect thereto, the trigger being configured for manipulation by a user for successive movement in:
a dosing motion from the ready position to the fired position generally in axial translation in which the trigger is associated with the plunger rod to cause the plunger rod to eject one of the doses of a predetermined volume, anda resetting motion from the fired position to the ready position that comprises axial rotation, wherein the trigger is uncoupled from the plunger rod during the resetting motion. |