Patent ID: 8152781

Claim:
An injection needle with a safeguard cap, comprising: an injection needle including a hollow needle and a holding member for attaching the hollow needle to a medical device; and a safeguard cap for safeguarding the injection needle, wherein the safeguard cap comprises: a housing part for housing the hollow needle; a base to be attached to the holding member, and a joint for joining the housing part and the base to each other, the housing part is formed in a tubular shape, with one end thereof being open and the other being closed, the base is provided with a projecting part that is engaged with the holding member so as to prevent a relative rotation between the base and the holding member; the joint is formed of a plurality of bridge-like members that are provided along a circumference of an opening of the one end of the housing part at intervals, the bridge-like members extend in an axial direction of the housing part so as to be joined at a tip end thereof in the axial direction to the base and are formed so as to be reduced in width gradually from the housing part toward the base, and when the housing part of the safeguard cap is rotated about its longitudinal axis, a breaking force is applied to the bridge-like members due to the relative rotation between the housing part and the base, the bridge-like members are formed so as to be reduced in width gradually from the housing part toward the base thereby breaking the bridge-like members such that the housing part is separated from the base, with the base remaining attached to the holding member, while the bridge-like members remain with the housing part.