Patent ID: 6217551
Filing Date: 2001-04-17
Classification: A61M

Abstract:
An injection needle provided at the tip of an injector, wherein the injection needle is provided with a rotatable operation member in front of a base, an engagement member is fixed rearward on an outer periphery of the needle, a spring is provided in such a manner that a front of the needle extends from a front end of the operation member while the engagement member pierces into a center of an axis of the base and the operation member, and the engagement member is energized backward with respect to the base, and the engagement member is latched by a front of the base to hinder the retreat of the engagement member, and when the operation member is rotated with respect to the base from the foregoing state, the hindrance to retreat of the engagement member with respect to the base is released, resulting in a deep retreat of the needle from the front end of the operation member.