Patent ID: 9095657
Filing Date: 2015-08-04
Classification: A61M

Abstract:
1. A medicament delivery device, comprising: a tubular housing configured for accommodating a medicament container; a dose setting member rotatable in relation to the housing for setting a dose to be expelled; a plunger rod configured for acting on a stopper inside the medicament container, such that a translational movement of the plunger rod in a proximal direction causes the dose to be expelled; a driver that converts a rotational movement of the dose setting member into translational movement of the plunger rod; a spiral-strip clock spring transverse to a longitudinal direction of the device having a first end connected to the dose setting member and a second end connected to a drive member interactively connected to the plunger rod, such that the clock spring is tensioned upon rotation of the dose setting member; a hold and release member releasably connected to the drive member for holding the clock spring in a tensioned state and for releasing the clock spring from the tensioned state; and an activator having a distal end protruding through a distal passage of the dose setting member, and being interactively connected to the hold and release member such that when the activator is pushed in the proximal direction, the hold and release member is proximally moved, whereby the clock spring is released from its tensioned state, forcing the drive member to rotate; wherein the activator is connected through a center of the clock spring with the hold and release member on a proximal side of the clock spring; and the activator comprises an activation member having a distal end protruding through the distal passage of the dose setting member, and an activation sleeve coaxially arranged within the drive member, movable in relation to the drive member in a longitudinal direction through the center of the clock spring, and having a distal end co-acting with the activation member and a proximal end co-acting with the hold and release member.