Safety system for a syringe

Set of a device security support for a syringe and a syringe having a body (10) having a collar (20), a piston (12) and a needle (14), the device comprises a support sleeve (16; 116) for the syringe body and safety means comprising an inner sleeve (18) slidable relative to the support sleeve between an input position waiting in the inner sleeve ( 18) it is substantially entered inside the support sleeve (16; 116) being suitable to meet around a part of the limb at least the syringe body (10) carrying the needle (14) and an extended position protection in which the inner sleeve (18) exceeds the outside of the support sleeve to form a protection around the needle, the device further comprising retaining means (30, 32, 22; 126A, 128A) capable of be activated to retain the inner sleeve (18) in input waiting position in the support sleeve (16; 116) and being deactivated to allow the exit of the inner sleeve (18) under the action of the biasing means (34). Characterized in that it comprises means shim (22, 24; 122, 124) which are integral with the support sleeve (16; 116) and maintaining the body (10) of the syringe fixedly in this Finally, these means wedging comprise a stop surface (22; 122) against the collar (20) is immobilized by means forming a rib attachment (24, 124) and by the fact that the means of retention (30, 32, 22; 126A, 128A) are capable of being deactivated depending on the position of the piston (12) of the syringe, while the body (10) of the syringe remains held securely in the support sleeve ( 16; 116) for immobilizing the collar (20) of the syringe held by wedging means (22, 24; 122, 124).