Patent ID: 8100858

Claim:
A protective device of an injection needle or infusion needle characterized in that: a needle holder holds a portion of the needle on an end spaced apart from a needle tip; a needle protective element comprises a wall portion having a sleeve which said needle penetrates and two resilient arms extending from said wall on both sides of the needle, each said resilient arm having a distal end portion that offsets with respect to one another, press-contacts with the needle shaft in a standby position and covers the needle tip in a protection position; a grip part comprises an interior surface defining an interior cavity which accepts said needle protective element therein and an exterior surface defining a gripping portion; the grip part and the needle holder have portions that overlap when the protective element is in the standby position; the grip part is configured to be gripped and slide distally, which separates the grip part from the needle holder, which grip part then moves the protective element to the protection position where said two resilient arms disengage from the needle to protect the needle tip; and an enlarged diameter part disposed on the needle shaft in the proximity of the needle tip is blocked by the sleeve of the wall portion of said needle protective element to prevent the needle protective element from being displaced further.