Patent ID: 9656025
Date: 2017-05-23
CPC Classifications: A61M

Claim:
1. An injection device, comprising: a housing; a container holder arranged in the housing and configured for accommodating a medicament container having a needle attached to one end thereof and a stopper sealingly and slidably arranged in the medicament container at the other end thereof; first and second energy accumulating members arranged in an interior of the housing that accumulate and store energy; a sleeve slidably arranged in relation to the housing, the sleeve having at least one opening and/or recess; a plunger holder connectable to the container holder and configured to compress the first energy accumulating member between the housing and the plunger holder such that due to an output axial force from the first energy accumulating member, the plunger holder and the container holder are axially movable in relation to the housing a predetermined distance toward a proximal end of the injection device from an initial position to a position following needle penetration; a plunger rod arranged with a proximal end thereof contactable with the stopper and slidably arranged in relation to the plunger holder and to the container holder, the plunger rod being configured to compress the second energy accumulating member between the plunger holder and the plunger rod such that due to an output axial force from the second energy accumulating member, the plunger rod is axially movable in relation to the container holder toward the proximal end of the injection device from a locked position to a position following medicament injection; and a needle cover that is axially movable in the housing, that protrudes from the proximal end of the injection device in an initial position, and that is operably connected to the sleeve; wherein in the initial position of the plunger holder, movement of the plunger holder toward the proximal end of the injection device is substantially inhibited by at least one first lever that is fixed in relation to the housing and that interacts with the plunger holder, the first lever being biasable; and pressing the proximal end of the injection device against a dose delivery site causes the needle cover and the sleeve to move distally, recoiling the at least one first lever when being overlapped by the at least one opening and/or recess on a side surface of the sleeve such that the plunger holder is released.