Patent ID: 7789863

Claim:
A needle protecting device for an injection apparatus comprising a proximal end, a distal end, an injection needle with a needle tip and a needle base, beyond which the injection needle protrudes, said needle protecting device comprising: a needle protector movably connected to the needle base and moveable from an initial position covering the needle tip to an exposing position in which the needle tip of the injection needle protrudes beyond the needle protector to a protective position in which it overlaps the injection needle including the needle tip; a first blocking mechanism connected to the needle protector comprising a disc-shaped base body, two attaching mechanisms which co-operate with prongs extending from the needle protector to form a rotary joint comprising a tilting axis at a rotational axis of the rotary joint, wherein the two attaching mechanisms comprise a shaft of the rotary joint and the prongs comprise a socket of the rotary joint, two rotational blocks arranged offset with respect to each other in the circumferential direction and in a guiding engagement with axial guides of the needle protecting device, said guiding engagement preventing rotational movements of the first blocking mechanism and thus rotational movements of said needle protector about the longitudinal axis, and a central passage through which the needle base projects, wherein at equilibrium, the disc-shaped base body forms a tilting arm both to the left and right of the tilting axis; and a second blocking mechanism connected to or formed in one piece with the needle base; and wherein when the needle protector is in the protective position, the blocking mechanisms are in a blocking engagement with each other as at least one of the two tilting arms are in stopper contact with the second blocking mechanism, and said stopper contact blocks the needle protector from moving into the exposing position.