Patent ID: 8016797

Claim:
A needle guard device for or on an injection device, the needle guard device comprising: a) an injection needle extending along a longitudinal axis of the needle guard device, b) a needle holder which is attached to or can be attached to the injection device, from which the injection needle extends in a distal direction, c) a spring element, d) a needle guard element, which can be moved by an external force against a spring force of the spring element from a distal initial position, in which it surrounds the injection needle to beyond a needle tip, in the proximal direction by a releasing stroke as far as a releasing position exposing the injection needle and out of the releasing position in the distal direction as far as a guard position in which it surrounds the injection needle and the needle tip, e) a lock mechanism, which locks the needle guard element in a locked connection in the guard position to prevent a movement in the proximal direction, and f) a locking member arranged in an interior of the lock mechanism, wherein the locking member is axially movable relative to the lock mechanism upon establishing an engagement with the needle guard element, said engagement established as the needle guard element moves, relative to the lock mechanism and the locking member, into a triggering position disposed between the initial position and the releasing position, wherein g) upon reaching the triggering position, the engagement is established by a locating element of the needle guard element moving into a driving connection with a complementary locating element of the locking member, wherein h) in the driving connection, the needle guard element slaves the locking member in the distal direction, and due to the spring force returning the needle guard element engaged with the locking member from the triggering position to the guard position, the locked connection is established by the locating element of the needle guard element abutting a lock stop of the lock mechanism, the abutting contact preventing the needle guard element from moving in the proximal direction.