Patent ID: 7566324

Claim:
An injection device comprising a needle cover, said injection device comprising: a) a casing comprising a container holder for a container containing an injectable product, and a cladding structure which surrounds at least an axial section of said needle cover when the needle cover is in a locking assembling position; b) a piston in the container, wherein a stroke of the piston delivers the injectable product, and a piston rod axially faces a rear side of the piston; c) a needle holder comprising an injection needle which is or can be connected fluidically to the container by means of said needle holder; d) said needle cover carried by said casing; e) a spring effectively acting between said casing and said needle cover, said spring providing a elasticity force for moving said needle cover forward into a non-locking protecting position; f) wherein the needle cover carried by the casing is movable against the elasticity force of the spring from the non-locking protecting position, past a non-locking injection position, into the locking assembling position; g) wherein, in said non-locking protecting positions the needle cover extends beyond a needle tip of said injection needle, and in said non-locking injection position, is short of said needle tip; h) wherein, in said locking assembling position, the needle cover allows access to the needle holder, such that the needle holder can be gripped and connected to or detached from the casing; i) wherein the casing comprises a first locking element and the needle cover comprises a second locking element, said locking elements in a locking connection in the locking assembling position of the needle cover, said locking connection preventing the needle cover from moving past the non-locking injection position into the non-locking protecting position by the elasticity force of the spring; and j) wherein the container holder and the cladding structure are connected such that they form an annular space, which accommodates the needle cover over the majority of its axial length when the needle cover is in the locking assembling position.