Patent ID: 8900198

Claim:
A device for protecting an injection device, the device comprising a body in which the injection device is placed, a sleeve mobile in relation to said body, means for moving the sleeve in relation to the body, and locking means making it possible to lock the sleeve in a protective position; the sleeve movable between a non-protective position, in which an injection member mounted on the injection device is exposed so as to allow injection, and said protective position, in which the sleeve completely covers the injection member; said locking means comprise at least one flexible proximal leg integral with, and compressible longitudinally relative to, the sleeve, forming a first bearing surface through which said at least one leg engages, in said protective position, behind at least a first corresponding distal bearing surface arranged of said body so as to constrain movement of the sleeve toward said non-protective position; characterized in that the at least one leg comprises at least one additional bearing surface arranged thereon, and in that the device comprises at least one corresponding additional bearing surface circumferentially spaced out of longitudinal alignment with said first corresponding distal bearing surface, said respective additional bearing surfaces being able to bear against each other when a force is exerted on the sleeve in a direction tending to return the sleeve toward said non-protective position so as to constrain at least movement of said at least one leg in a circumferential direction.